例句：

　　1、Stock markets plunged at the news of the coup.

　　政變的消息一傳來，股票市場(chǎng)便暴跌。

　　2、He took the plunge into the deep end.

　　他跳入深水區(qū)。

　　3、Our income has plunged in the last few months.

　　我們的收入在最近幾個(gè)月中驟減。