The sinking air is also carried along the surface to the equator, where it rises again, strengthening the already-powerful western winds in the upper atmosphere in the tropics.
下沉到海水表面的空气也会顺流而下到赤道附近，在那里它又变强，加强热带地区高空大气的西风。
Altocumulus lacunosus. “An elusive prize for any cloud collector,” lacunosus clouds form when sinking pockets of air create holes in a cloud layer.
高积网状云。 “对于所有的观云爱好者来说，能欣赏到这种难以捉摸的云彩无异于恩赐，”当下沉的气团在云层中形成空洞时，网状云便出现了。
As they rapidly churn their legs, they slap their splayed feet hard against the water, creating a tiny air pocket that keeps them from sinking, provided they maintain their speed.
当它们迅速摆腿，它们把展开的脚用力蹬水，如果保持了速度，那么所产生的小气涡能让它们不沉入水里。
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