At a single motion of his hand, the room fell silent.

　　他手一揮，屋子里便安靜了下來。

　　He gave me the silent treatment.

　　他對我不予理睬。

　　As the curtain rose, the audience fell silent.

　　幕啟時(shí)，觀眾安靜下來。

　　The report is strangely silent on this issue.

　　很奇怪，報(bào)告對這個(gè)問題避而不談。

　　They huddled together in silent groups.

　　他們一群群地圍在一起，默不作聲。