例句：

　　He dived in after her without a second thought.

　　他不假思索地隨她跳入水中。

　　The plane made a dive to a lower altitude.

　　飛機俯沖到較低高度。

　　He dived below the surface of the water.

　　他潛入了水中。

　　Profits really took a dive last year.

　　去年利潤確實(shí)突然下降了。

　　He dived in and hit his head on the bottom.

　　他跳進(jìn)水里，頭撞到了池底。