stand-off 在电子行业什么意思

The Apple iPad is basically a gigantic iPod Touch says PoguePogue认为iPad还是一个放大版本的iPod TouchNo physical keyboard没有物理键盘no Webcam没有摄像头no USB ports没有USB接口no multitasking不能执行多任务No headphones with the device没有随机标配耳机Not as good for writing or editing longer documents在编辑长文档的时候比较痛苦Not good for anything that requires Flash不能在你需要额外空间时通过扩展闪存来得到空间battery is sealed in and nonreplaceable电池内置不可自己更换Memory, also sealed in and nonexpandable (ranges from 16 gigabytes to 64 gigabyte)内置的存储空间也无法升级，用户只能选择容量从16G到64G的几个型号no stand but $39 iPad case works well没有直立支架，但是39美元的iPad盒子可以很好的承担起相应工作iWork works well, a “serious content creation app”, but exporting to Microsoft’s formats (which only Pages can do) doesn’t work so welliWork这个软件套装用于创建严肃的商业文档，将帮助iPad与笔记本争夺用户。它能导入微软的Office格式的文档，但只有字处理能导出为Office格式，而且经常出现格式错误。我遇到了文字对齐错误的问题。我尝试导出为PDF文档，结果发现导出的文档完全不可用。 No Weather, Clock and Stocks apps没有天气、时钟和股票软件iPad heavier than KindleMost people need two hands to use iPadThe iBooks app also lacks any way to enter notes, and Apple’s catalog at launch will only be about 60,000 books versus more than 400,000 for Kindleemail app lacks the ability to create local folders – email app doesn’t include rules for auto-sorting messagesemail app doesn’t include group addressingNo tabs in SafariWifi only version lacks GPSWiFi版的iPad是没有GPS的Wide screen view can be awkward Either you have black bars in wide screen view or you get some of your image cut off in fill screen viewiPad不适合播放宽屏视频There’s an e-book reader app, but it’s not going to rescue the newspaper and book industries says PoguePogue认为，虽然iPad是个很好的电子书阅读装置，但iPad 仍无法挽救新闻和图书行业At 15 pounds, the iPad gets heavy in your hand after awhile (the Kindle is 10 ounces)15磅的重量让iPad比Kindle更容易让人感觉到重量You can’t read books from the Apple bookstore on any other machine — not even a Mac or iPhone无法在其他设备上阅读在 iBook 商店购买的书，即便在 Mac 和 iPhone 上也不行。When the very glossy 97-inch screen is off, every fingerprint is grossly apparent97英寸的屏幕就是一个指纹收集器，你把背光关掉就可以很清楚的看到You can’t read well in direct sunlight在阳光下几乎无法看清屏幕Pogue: “When the iPad is upright, typing on the on-screen keyboard is a horrible experience; when the iPad is turned 90 degrees, the keyboard is just barely usable (because it’s bigger) A $70 keyboard dock will be available in April, but then you’re carting around two pieces”Pogue认为，使用iPad在正常位置打字很不方便，即使旋转90度之后依然如此，当然你可以选择购买70美元的外接键盘，如果你不觉得让便携性降低的话。Pogue: “The bottom line is that you can get a laptop for much less money — with a full keyboard, DVD drive, USB jacks, camera-card slot, camera, the works”Pogue认为，如果你需要全尺寸键盘、DVD光驱、USB接口以及读卡器、摄像头等功能的话，那么一台笔记本电脑比iPad更适合The new iBooks e-reader app is filled with endearing grace notes新款iBook电子阅读器无法进行笔记Apple says that 150,000 existing iPhone apps run on the iPad but many appear or small and dead center on the screen — or, with a tap, doubled to fill the screen, a little blurry虽然苹果表示，现有的超过15万个iPhone应用程序都能在iPad上运行，但是由于iPad屏幕尺寸的增大，所以一些程序在运行时显示效果会很差Skype (even voice calls, through its speaker and microphone) Just no videoiPad的Skype只能语音通话，无法使用视频Pogue: The iPad is not a laptop It’s not nearly as good for creating stuffPogue认为，iPad不是笔记本电脑，所以它并不具备很好的创造力Pogue: It’s infinitely more convenient for consuming it — books, music, video, photos, Web, e-mail and so onPogue认为，iPad是个很好的消费途径，当你需要读书、听音乐、看视频、照片、上网、收发邮件等应用时You will have to buy into the iTunes ecosystem, of course, to watch movies, read e-books and sync up the apps你不得不去使用iTunes这个软件，当你观看视频、阅读电子书或者是同步你的应用程序时You have to purchase a $29 iPad Camera Connection Kit, which lets you connect a USB camera or import photos via an SD card你需要额外付出29美元的代价才能够通过相机连接套件来导入照片，这个套件可以让你通过连接来导入SD卡中的照片Baig: “Many people will still need a more traditional computer You can’t edit video on an iPad And the virtual onscreen keyboard that pops up when needed is fine for e-mails or scribbling notes, but I wouldn’t want to regularly write articles using it “Baig认为：““许多人都还需要一个更传统的计算机。iPad无法编辑视频。而虚拟屏幕键盘可以进行电子邮件撰写或涂鸦笔记，但我不想写文章经常使用它。”  No coverflow in iTunesiTunes 不带 Coverflow

不能被解析为一个变量！

出现“a cannot be resolved to a variable”意思是“a不能被解析为一个变量”。因为a定义为局部变量，可是在另一个子程序中使用了它，那肯定找不到。所以出现找不到a这个变量的情况。

解决方法是：将a改为全局变量。

这样既可:

public class first {

public static void main(String[] args) {

int a=0, i;

for (int x = 101; x <= 200; x++) {

for (i = 2; i < x; i++) {

if (x % i == 0)

break;

}

if (x == i) {

Systemoutprintln(x);

}

a = a + 1;

}

Systemoutprintln("所有的素数个数是" + a);

}

}

Java是一门面向对象编程语言，不仅吸收了C++语言的各种优点，还摒弃了C++里难以理解的多继承、指针等概念，因此Java语言具有功能强大和简单易用两个特征。Java语言作为静态面向对象编程语言的代表，极好地实现了面向对象理论，允许程序员以优雅的思维方式进行复杂的编程。

Java具有简单性、面向对象、分布式、健壮性、安全性、平台独立与可移植性、多线程、动态性等特点。Java可以编写桌面应用程序、Web应用程序、分布式系统和嵌入式系统应用程序等 。

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