They have small air pockets like honeycombs.
它们有像蜂巢一样的小气囊。
It was a small vacuum chamber, about the size and shape of a bathtub stopper, that contained a plunger and spring, and had two small air hoses attached to it.
它是一款非常小巧的真空管,形状和大小如浴缸塞,内含一个柱塞和弹簧,由两个小型空气软管连接。
During the pupa stage, they do not eat foods but do sit at the surface and breathe air through two small tubes.
在蛹阶段,它们不吃食物,但在水面游动时会靠两个细小的管道呼吸空气。
They will fire darts from small air rifles to collect blubber and skin for genetic testing,and to attach satellite-tracking tags to monitor the whales.
VOA: standard.2010.01.05
When melting snow crystals or raindrops fall through very cold air, they freeze to form small particles of ice,called sleet.
VOA: special.2010.01.05
When melting snow-crystals or raindrops fall through very cold air, they freeze to form small particles of ice, called sleet.
VOA: special.2011.01.11
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