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.
去年利潤確實突然下降了。
He dived in and hit his head on the bottom.
他跳進水里，頭撞到了池底。