N a localized region of low air density or a descending air current, causing an aircraft to suffer an abrupt decrease in height (使飞机骤跌的)气穴
They have small air pockets like honeycombs.
它们有像蜂巢一样的小气囊。
Air pockets are shown as blue, soft tissues as beige, blood vessels as red and bone as white.
体腔用蓝色标识，软组织用米棕色，血管用红色，骨骼用白色。
Its nano-sized pores can not only collect pollutants like a sponge but they also act as air pockets.
气凝胶的纳米级微孔不但能够像海绵一样收集污染物，它们还能够起到空气容器的作用。
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