大学生英语专业学习时遇到不懂的该怎么解决

大学生英语专业学习时遇到不懂的该怎么解决 凡是不懂的立即发问，steps as following,
1.先举手说Pardon me!
2.跟着说:May I ask you a question?
3.I am not really understand this phase, please repeat or slow down for explanation.
一定要发问，否则越来越难,进度很难追回了!