http://zuoye.baidu.com/question/f1e3db7358aaa7f6f745a2b1c6f3c274.html
Padon?Could you speak louder?
Your voice is too low,could you speak up?
Could you speak louder?It‘s hard to hear your words.
Your voice is too low, could you speak up a little bit?
原文：http://www.cnblogs.com/xue0/p/4461608.html