Can you speak alouder? I can‘t hear you.

　　您能说得声音大一点吗?我不能听到您说话。

　　Excuse me, I can't hear you clearly.

　　请再说一遍，我听不清。

　　Pardon? I didn't quite catch what you said just now.

　　请重复一下，我刚才没听清您在说什么。

　　I am sorry, I didn't catch that.

　　对不起，我没听清楚。

　　I want to listen to it once more.

　　我希望再听一遍。

　　I can‘t hear you very well.

　　我没听不太清楚。

　　I can barely hear you.

　　我几乎听不到您说的。

　　We have a bad connection.

　　通讯效果不太好。