线路很糟糕。 The line is very bad. 有很多杂音。 There is a lot of background noise. 线路有干扰。 The line is crossed. 你大声点好吗？ Could you speak louder? 你说慢点好吗？ Could you speak slowly? 对不起，我听不太清楚。 Pardon me,I can't hear you very well. 再说一次好吗？ What was that again？