It的20种用法全分析

It的20种用法全分析,第1张

生病要服药,但吃什么药,什么时候吃,该怎么服用,都是很有讲究的。有些人不在规定时间内服药,当他们想起来时才服药,有些人用牛奶或茶服药。甚至有一则新闻,一名心血管患者在睡觉前服用了降压药,夜间睡眠血压下降导致突出心脑血管意外。由此可见,错误的吃药习惯,不仅会药效的发挥,还可能危害身体健康。安全用药,我们到底应该注意哪些事项呢?

合理用药是建立系统的药物和疾病知识基础上,为患者选择有效、安全、经济的药物并按照正确的方法服用。安全用药,必须牢记以下六点:

1、遵循医嘱服药,不盲目用药,不随意停药;

医生会根据患者病情及实际情况,选择最有针对性的药物治疗疾病。即使患者自我感觉很严重,也不要随意加大药物剂量,轻则加重病情,重则危及生命;即使病情出现好转,也不要擅自减少药物用量和用药频次。

2、认识到医药广告的误导性,不盲目听信;

电视、网络等各种媒体铺天盖地的医疗广告,广告常常容易夸大疗效,作为消费者不可盲目听信广告宣传随意服药,非但不能治疗疾病,反而会因为错误用药致使病情恶化。

3、治病选药看疗效,只选对的不选贵的;

在医药上,并非一分钱一分货,药物的疗效和价格并不成正比。药物价格高并不完全代表就能药到病除,药物的好坏应从药物作用、适用症、毒副作用等多方面去衡量,疗效确切、安全稳定、毒副作用小、价格低廉、使用方便的药就是好药。

4、中药也有副作用,别乱吃;

但凡药物都有两重性,能帮助治疗疾病的同时,又有毒副作用,重要也不例外。中药看似纯天然无害,很多人常常把中药当补药服用,专家指出滥用中药不仅不能治病,还会损害身体。

5、服药前看说明书;

药物说明书记载了药物的适应症、有效成分、不良反应、禁忌及正确保存方法,服药前应该仔细通读,看清用法用量、了解功能主治,才能对症下药,保证安全服用。

6、定期整理药箱,及时清理过期药品。

家庭药箱要定期整理,一旦发现药品过期要及时清理丢弃,服用过期药物不但不能治病,还可能贻误病情,损害身体健康甚至危及生命。

一it的用法 1、it指代上文所提事物的本身(it表时间、强调等的用法此处不阐明),如果所代替的事物为复数,则应该用they或them表示。 2、it也可以用来代替上文所提到的一件事。 二、that的用法 1、that用来指前文中确定的非同一事物,常用来替代与定冠词或形容词性物主代词连用的单数可数名词或不可数名词,相当于“the+名词”,其复数形式为those。 2、that表替代时为始终是特指(作指示代词和关系代词用时另论),可指上文谈到的人、物或情况(均为单数),可代替可数名词和不可数名词。 3、若that所代替的内容为前置用法,即要代替的内容将出现在下文中,一般用this,these或the following表示

以下是我为大家整理的it 的用法 总结 ,希望能帮助大家更好地认识it这个单词,提高英语水平。

1 It is + 被强调部分 + that

句型是强调句型。将被强调的部分放在前面, 其它 部分置于that之后。被强调部分可以是主语,宾语,表语或状语。强调的主语如果是人,that可以由who换用。如果把这种句型结构划掉后,应该是一个完整无缺的 句子 。这也是判断强调句型与其它从句的 方法 。

It was about 600 years ago that the first clock with a face and an hour hand was made

It was they that (who ) cleaned the classroom yesterday

It was in the street that I met her father

2 It is clear ( obvious, true, possible, certain) that

该句型中it 是形式主语,真正的主语是that 引导的主语从句,常译为"清楚(显然,真的,肯定)" 是主语从句最常见的一种结构。

It is very clear that he’s round and tall like a tree

= That he’s round and tall like a tree is very clear

3 It is important ( necessary, right, strange, natural) that

该句型和上一个同属一个句型。由于主句中的形容词不同,that 后的从句中要用虚拟语气(should + 动词原形),should 可以省去。建议记住该句型中的形容词。

It is important that we (should) learn English well

It is necessary that he (should) remember these words

4 It is not until + 被强调部分 + that

该句型也是强调句型。主要用于强凋时间状语,译成汉语"直到才",可以说是 not until 的强调形式。

It was not until she took off her dark glasses that I realized she was a famous film star

= Not until she took off her dark glasses did I realize she was a famous film star

= I didn’t realize she was a famous film star until she took off her dark glasses

5 It is said (reported, learned) that

该句型中的it 仍是形式主语,真正主语是that 引导的主语从句。该结构常译为"据说(据报道,据悉)"。

It is said that he has come to Beijing

It is reported that another earth satellite has been put into orbit

6 It is suggested ( ordered ) that

该句型和上一个同属一个句型。主句中的过去分词是表示请求,建议,命令等词时,that 后的从句要用虚拟语气(should + 动词原形),should 可以省。常译为"据建议;有命令)

It is suggested that the meeting ( should ) be put off

It was ordered that we ( should ) arrive there in two hours

7 It is a pity ( a shame ) that

该句型中,that后的从句一般用虚拟语气(should + 动词原形),should可省去表示出乎意料,常译为"竟然"。没有这种意义时,则不用虚拟语气。

It is a pity that such a thing ( should ) happen in your class

这种事竟然发生在你们班上,真是遗憾!

It is a pity that he is ill 他生病了,真遗憾!

8 It is time ( about time ,high time ) that

该句型中that 后的从句应该用虚拟语气,值得注意的是① 常用过去时态表示虚拟② 有时也用should + 动词原形,should 不能省。常译为"是(正是)的时侯"。

It is time that children should go to bed

= It is time that children went to bed

9 It is the first ( second ) time that

该句型要和上一个句型区别开来。该句型中的 that 从句不用虚拟语气,而用完成时态。至于用什么完成时态,由主句的谓语动词的时态决定。如果是一般现在时,后面从句用现在完成时态;如果是一般过去时,后面从句则用过去完成时态。该结构中 that 可以省去;it有时用 this 替换常译为"是第一(二)次"。

It is the first time I have been here

= This is the first time I have been here

10 It is since

该句型主要用作处理瞬间动词的完成时,又要和表示一段时间的时间状语连用的问题。主句中是时间作表语,其时态是现在时或完成时,since 引导的从句通常是一般过去时态,而且是瞬间动词。如果主句是一般过去时,从句则用过去完成时。

It is ( has been ) 5 years since his father died

11 It is when

该句型中的 when 引导的是一个时间状语从句,主句中的 it 指时间,表语由具体的时间充当。常译为"当的时候,是"。

It was 5 o’clock when he came here

12 It be before

该句型主句中的 it 指时间, 主句中的时态常是将来一般时或过去时两种时态主句中的表语多是long, not long , 3 days , 2 weeks 等表示时间段的词或 短语 。常译为"之后"。

It was 3 days before he went to Beijing

It will be not long before he finishes his job

13 It happens (seems, looks, appears ) that

该句型中it是形式主语,that 引导的是主语从句,主句中的happen , seem等词是不及物动词

It happened ( so happened ) that he met his teacher in the street 碰巧

It seems that he will be back in a few days 看来

14 It takes sb to do sth

该句型中的不定式是真正的主语,it是形式主语,句型中的直接宾语是时间。常译为"做要花费某人"。

It took thousands of people many years to build the Great Wall

15 It is no good (use ) doing sth

该句型中的真正主语是动名词短语,主句中的表语可以是no good , ( not any good ) , no use , ( not any use )。

It is no good learning English without speaking English

16 It doesn’t matter whether ( if )

该句型中whether(if) 引导的从句是真正主语,该句型常译为 "不论(是否)没关系。

It doesn’t matter if they are old

17 It is kind ( of sb ) to do sth

该句型中的不定式短语是真正主语,如果不定式的逻辑主语是由 of引起,主句中的形容词必须是能表示逻辑主语特征的形容词。常见的有: bad , brave , careless, clever , cruel , foolish , good (好心的), honest , horrible , kind , lazy , modest , naughty , nice(有教养的), polite, rude , silly , stupid , wise , wrong(错误的)等。 这个句型可以改写为:sb is kind to do sth

It is kind of you to say so

= You are kind to say so

18 It is necessary ( for sb ) to do sth

该句型与上一个同属一个句型。如果不定式的逻辑主语是由for引起,主句中的形容词通常是表示重要性,紧迫性,频繁程度,难易,安全等情况的形容词。常见的形容词有:① important, necessary, natural ② easy , safe , common , normal , hard , difficult , dangerous , unusual, rare , impossible , pleasant等。

在①中的形容词作表语可以用从句改写, 如:

It is important for her to come to the party

= It is important that she (should ) come to the party

19 It looks ( seems ) as if

该句型中it无意义。 as if 引导一个状语从句。常译为,"看起来好象"如果与事实不相符合,则用虚拟语气

It looks as if he is ill(真的病了)

It looks as if he were ill (没有生病)

It seemed as if he were dying

20 We think it important to learn a foreign language

该句型中的it 作形式宾语。为了记忆方便我们可称该句型为"6123结构"。

6指主句中常用的动词:think, believe, make, find, consider, feel;

1指的是形式宾语it;

2指的是宾补的两种形式:形容词或名词;

3指的是真正宾语的三种形式:不定式短语,动名词短语或that引导的宾语从句。

We think it our duty to clean our classroom every day

He felt it important learning English well

They found it difficult that they would finish their work in two days

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同学您好:

It的用法:

a某样东西:where’s my mapI left it on the table

b抽象事物: you’ve savedmy life I shall never forget it

c不知性别的孩子: her new babyis tiny It only weighs 2 kilos

d某种感觉或情况: does it itchmuch Where does it hurt

e是谁:who is that----- It’s me

f时间、日期等:what time is it ---- it is eight o’clock

g天气、环境等: it’s raining

h距离: how far is itto Chicago

想获取更多学习资料可关注:>

it是代词,放在由动词与介词组成的短语时,就要放在介词之前,动词之后,如:

give it up放弃它,不要说成give up it;

其他代词也一样:cheer him up使他振奋起来

put them away把它们拿走

而如果不是代词,而是名词或动名词,便直接放在后边:

give up saving the tree放弃救那棵树

It用法小结

it在英语语法中属人称代词,意思是“它”,用来指人以外的一切生物和事物。它的用法不仅不简单,而且很复杂。

一、用于指人以外的一切生物、无生命的东西和事情。

一般指说话者心目中已经了解或所指的生物、无生命的东西或事情、没有性别的区分;可以是可数名词,也可以是不可数名词,在句子中既可作主语,也可以作宾语。

1.指动物和植物。如:

—Oh,that's Lucy's hat.噢,那是露茜的帽子。

—It looks like a cat!它看上去像只猫!

Where's tea grown?It's grown in the southeast of China.

什么地方种植茶?中国东南部种植茶。

2.指代一些无生命的东西。如:

Is it your watch?这是你的手表吗?

Look at the rain!It's heavy,isn't it?看这雨!雨很大,对吗?

3.代替上文提到过的整个事情。如:

Well,you mustn't play on the road.It's dangerous.哦,你不能在公路上玩。这太危险了!

It was hard work,but they really enjoyed it.摘苹果是艰苦活,可他们都乐意去干(它)。

二、用于指代人。

1.指代说话者心目中不太清楚的那个人,常在打电话或敲门时用。如:

—Who was it?是谁(打来的电话)?

—Was it Susan?(打电话的)是苏珊吗?

—Yes,it was.是的,我是。(根据上下句,“it was”也可不译出来。)

再如:—Who is knocking at the door?谁在敲门?

—It's me.是我。

2.指说话者心目中的那个人。如:

—Is it your sister,Kate?(那旧照片上的 baby)是你姐姐凯特吧?

—No!不是。

—Is it your brother?是你哥哥吧?

—No!不是。

—I know—it's you!我知道了,(那)是你。

3.指代性别不详的婴幼儿或在不计较性别时,也可用it来指人。如

The child smiled when it saw its mother.这小孩一见到母亲就笑了。

I don't know who it is.我不知道他是谁。

注意:看到这样的句子(或听到这样的话)时,要想一想,不要一看到it就把它译成“它”。)

4.在回答用指示代词表示人的特殊问句时,常用it指人。如:

—Who's that?那人是谁?

—Is it Kate?是凯特吗?

—Yes,I think you're right.It's Kate.是的,我想你说对了,是凯特。

三、用于指时间、距离和自然现象等。

1.表示时间。如:

—What time is it?几点钟?

—It's ten.十点钟。

It's summer in Australia now.现在澳大利亚是夏天。

特别注意it用于表示时间时还常见于以下两个句型中:

(1)It's time(for sb.)to do sth./It's time for sth.译为“是(某人)该干……的时间了”、“到……的时候了”。如:

It's time for supper/to have supper.是吃晚饭的时候了。

I think it's time for us to start the lesson now.我想现在是我们开始上课的时候了。

(2)It is /has been +时间段+since +一般过去时。译为“自从……以来已过了……(时间)”。此结构可以与另一种句型进行同义句转换。如:

It has been two weeks since we met last.= Two weeks has passed since we met last.自从我们上次相遇以来,两个星期过去了。

It's three years since he came here.=It has been three years since he came here.=He has been here for three years.他到这里已经三年了。

2.表示距离。如:

It's half an hour's walk from my home to the school.从我家到学校步行得花半小时时间。

—Where's the farm,Li Lei?Is it far?李雷,农场在哪里?远吗?

—No,it's quite near.不,(距)离这很近。

3.表示自然现象。如:

Sometimes it snows and the land is all white.有时下雪,大地一片白。

It is very quiet here at the moment.眼下这儿很安静。

四、用作形式主语。

英语中常常见到某个句子以it开头,it与其后面的动词不定式短语、动名词短语、名词性从

句等相呼应,以表达一个完整的意义。这是一种习惯表达法,这样的句式可避免句子显得头重脚轻。

1.It+is/was+形容词+(for/of sb.)+动词不定式短语。对于这个句型中究竟用 for还是用of,一般遵循这样的规则:如果形容词仅仅是描述事物的形容词,如:difficult, easy,hard,important,dangerous等用for;如果形容词是描述不定式行为者的性格、品质的,如:kind,good,nice,clever等则用of。如:

It is interesting to play with snow in winter.冬季里玩雪是很有趣的。

It's important for us to keep the water clean.保持水质清洁对我们来说是很重要的。

It's very kind of you to say so.你这样说真是太好了。

注意:这一句式中的形容词位置也可换用名词;连系动词be也可换用其它连系动词,如feel等。如:

It's a good habit to get up early and go to bed early.早睡早起是好习惯。

It must be great fun to fly to the moon in a spaceship.乘宇宙飞船飞往月球一定很有趣。

It feels strange to have a twin sister.有个孪生姐妹感觉很奇怪。

2.It +will be/is /was +形容词+动名词短语。如:

It's bad playing in the street.在街上玩是没好处的。

Is it any good trying again?再试一次有用吗?

3.It+is/was+形容词+从句。如:

It is certain that he will come.他一定会来。

It's true that he may fall behind the other students.他真的可能落后于其他同学。

It is strange that he should say so.他居然这么说,真是奇怪。

4.It +is /was +one's turn(duty,pleasure) +to do sth.意为“该轮到某人做某事(做某事是某人的责任、愉悦的事)”。如:

It's your turn to be on duty tomorrow.明天轮到你值日了。

5.It takes(sb.)some time to do sth.意为“(某人)花……时间做某事”。如

It took me a week to finish reading the book.我花了一周时间看完这本书。

6.It +cost/costs +sb.+some money +to do sth.译为“某人花多少钱做某事”。如:

It cost me 260 yuan to buy the new watch.我买这块新手表花了260元。

7.It seems /seemed +从句。译为“看起来好像……”,此结构可以转换成“seem +动词不定式”形式。如:

It seems that he is ill.=He seems to be ill.看起来他好像病了。

五、用作形式宾语。

当句子的真正宾语是动词不定式、动名词或从句时,为避免句子头重脚轻,须将其放在宾语补足语之后,改用先行词it占据其原来的位置。it用作形式宾语的句型为:主语+谓语+it+宾语补足语+动词不定式/动名词/从句。该句型中宾语补足语可由形容词、名词等充当。如:

He found it not easy to learn a foreign language well.他发现学好一门外语是不容易的。

We think it no good reading in bed.我们认为躺在床上看书无益处。

I think it necessary that we have the meeting.我认为开这个会是必要的。

下面是我整理的英文药品 说明书 关于用量与用法的写法,欢迎大家阅读!

本项最常用的英语表示法有:

Dosage and Administration 用(剂)量与用法

Route of Administration 给药途径(用法)

Administration 用法

Direction for Use 用法

Method of (for) Administration 用法

Application and Dosage 用法与用(剂)量

Mode of Application 用法

Dosage 用(剂)量

How to Use 用法

Posology 剂量学

还可能有其他的表示 方法 。

本项也是阅读的重点,读者必须正确理解本项内容中的给药对象、给药方式、剂量及剂量单位、给药时间等。

1、每次给药次数的表示方法

daily (per day, a day, every day ) 每日

every …hours 每隔…小时

intervats of … 每隔…

once (twice) daily (a day) 每日一(二)次

every other day 每隔一日

three times a day (daily) 每日三次

three times a week 每周三次

once (twice) a week (weekly) 每周一(二)次

Divided into … doses 分…次

in two or three divided doses 分为二或三次(个剂量)

例1 Unless other wise prescribed by the physician, the average daily dose is 1 capsule 3 times daily

如果医生不另开处方,平均日剂量为每日3次、每次1个胶襄。

例2 The suggested dose is 10 to 15 mg per kg dody weight daily in 3-4 divided doses orally, taken with meets

日剂量最好每公斤体重10-15mg,分3-4次口服,与食物共服。

例3 The initial dosage recommended is 1/2 tablet of Madopa 250 three times daily

开始剂量最好为每日3次,每次半片美多巴250。

例4 Children: The usual dose is 50 to 100 mg/kg/day total, given in four equally divided and spaced doses

儿童 :常用总剂量为每日50-100mg/kg体重,均分为四等份,等间隔给药。

例5 The recommended starting dose is 20mg given as a single daily dose

推荐的首剂量为每20mg,一次服用。

2、常用表示剂量的术语

average dose 平均剂量 minimal (minimum) dose 最小有效量

daily dose 日剂量(一日量) multiple dose 多剂量

divided dose 分次剂量 overdose (overdose) 过量

fatal (lethal) dose 致死量 single dose 一次剂量

indicated dose 有效蛴量 standard dose 标准(合适)剂量

initial (beginning, starting) dose 首次量 suggested (recommended) dose 推荐剂量

maintenance dose 维持量 therapeutic dose 治疗剂量

maximum dose 最大剂量(极量) usual (normal) dose 常用剂量

3、常用的剂量单位表示法

g=gram 克 l=liter (litre) 升

mg=milligram 毫克 ml=milliliter 毫升

kg=kilogram 千克 cc 毫升

mcg=microgram 微克 IU=international unit 国际单位

ug 微克 body weight 体重

per square meter of body surface 每平方米体表面积

4、给药对象:最常见的用词有

adolescents 青少年 intant(s) 幼儿

adult(s) 成年人 male 男性

baby (babies) 婴儿 newborn baby (babies) 新生儿

children (child) 儿童 patient(s) 患者,病人

debilitated patients 体弱患者 pediatric 儿科的

elderly patient(s) 老年患者 pregnant women 孕妇

female 女性 senile patient(s) 老年患者(病人)

5、给药方式的表示法:多用副词成或介词 短语 表示,例如:

intra-arterially 静脉内给药 by mouth (OS) 口服

intragluteally 臀肌内给药 by phleboclysis 静脉输液

intramuscularly 肌内给药 by intramuscular (IM) injection 肌肉注射

intraperitoneally 腹(膜)腔内给药 by intravenous (IV) injection 静脉注射

intrapleurally 胸(膜)腔内给药 by the intra-articatar administration 关节内给药

intrathecally 鞘内给药 by the intramuscular administration (route) 肌内给药

intravenously 静脉内给药 by the intranasal route 鼻内给药

locally 局部给药 orally 口服给药

parenterally 肠道外给药 by the intraperitoneal administration 腹(膜)腔内给药

subconjuntivally 结膜下给药 by the intravenous infusion (perfusion) 静脉输注

subcutaneously 皮下给药 sublingually 舌下给药

submucously 粘膜下给药 by the intrathecal administration 鞘内给药

by aerosol 喷雾给药 by the subligual administration 舌下给药

by drip phleboclysis 点滴静脉输液 per rectum 直肠给药

by enema 灌肠 per vaginum 阴道给药

by lumbar 腰椎给药 pro recto 直肠给药

此外还有许多其他的表示法,不一一列举。

6、表示“投药”的常用动词

administer (或be administered、give、be given、indicate、be indicated) 给药、投药

use (或be used 、employ、be employed) 用药

recommend (be recommended、suggest、be suggested) 推荐给药

7、表示不同的用药方式的动词:

take 服用 inhale 吸入 apply to 用于、涂于、敷于

spray 喷雾 inject 注射 swallow 吞服

例6 …the recommended single dose is 1 ampoule, given subcutaneously, intramuscularly or intravenously

建议一次剂量为1安瓶,皮下、肌肉或静脉注射给药。

例7 IM injections should be administered in the amount of 25-50mg daily per kilo of body weight, subdivided into injections every 6-8-12 hours

肌肉注射:每日每公斤体重给药25-50mg,每6-8-12小时一次。

例8 For adults give intramuscular injection of 400 to 600 mg per day in 2-3 divided doses For intants give intramuscular injection of 10-20mg/kg per day in two divided doses

成年人:肌肉注射,每日400-600mg,分2-3次注射;婴儿:肌肉注射,每日10-20mg/kg体重,分2次注射。

例9 The tablets (or the syrup) are to be taken during or after a meal with a little liquid

片剂(或糖浆)应于食间或饭后用少量液体送服。

例10 Apply the Nitro-Dur system firmly to the skin surface The Nitro-Dur system may beapplied to any convenient skin area, a recommended side of application is the arm or chest

把护心贴片紧贴在皮肤表面,护心贴片可贴在任何方便的皮肤区域,最好是贴在手臂或胸部。

例11 In general 1 to 3 metered doses should should be inhaled or sprayed onto or under the tongue at the every oneset of anginal pain

一般应在心绞痛开始发作时就吸入,或向舌上或舌下喷入1-3个规定的剂量。

8、 其它 的短语或句型,例如:

according to 根据 be adjusted 调整 depend on 依据 adapt to 适合,修改

on the basis of 在…基础上 vary from…to… 变化范围由…至…,因…而异

range from … to … 变化范围由…至…

it is advisable to (it is recommended to、it is suggested to ) 建议…

例子很多,不一一列举。

例12 Dosage should be adapted to patients individually, on the basis of periodic tests of glycosuria and blood sugar

在周期性检验尿糖和血糖的基础上,调整剂量,使之适用于不同的患者。

例13 It si advisable to initiate therapy with massive doses: 3x2 tablets daily after meals over 2-4 days

建议开始治疗时采用大剂量,每日剂量为3x2片,饭后服用,持续2-4日。

例14 In severs chronic cases, treatment is started with daily 1 to 2 ampoules of Bilocid and continused with one ampoule every other day, injected slowly by the intravenous route

治疗严重的慢性疾病时,治疗从每日1-2支利胆素注射剂开始,继续治疗时每隔一日1安瓶缓慢静脉注射。

例15 The number of injections required may vary from from patient to patient

所需注射次数因患者而异。

例16 The dosage of Glutril must be adjusted by the doctor according to the individualmetabolic state

格路特利的剂量需由医生根据每个患者的代谢状况调整。

例17 In such instance, it is recommended that the dose be reduced

在这种情况下,建议减少剂量。

例18 The maintenance dosage is determined by response of the patient

维持剂量视患者对药物的反应而定。

从上述例句可见,本项中英语的普通词汇较多,只要有一定的英语基础均可读懂,专业词汇多为医学词汇,可从英汉医学词典中查出。

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