air renewal

• 换气

air renewal的用法和样例：

例句

1. The diver came up for air again.
   潜水员又露出水面换气。
2. Like modern whales, Basilosaurus was an air breather and could not have stayed underwater for long periods of time.
   和今天的鲸鱼一样，龙王鲸需要换气，不能长时间待在水下。