The two impellers are arranged at the lower end of the axle sleeve to ensure moderate air-draft amount.

两片叶轮装在轴套下端，确保引风量适中。

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This is because the tremendous heat produced from a nuclear blast causes an up-draft of air that forms the familiar mushroom cloud.

这是因为核爆产生的大量的热能会把空气往上吸入，形成令人熟知的蘑菇云状。

youdao

And anyway, how could my nose know that a draft of air has been playing on the back of my neck?

再者说了，我的鼻子怎么可能知道空气在我脖子后面流动？

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An additional restriction is that vessels must have less than a 190-foot air draft.

FORBES: The Port of New York and New Jersey, a Critical Hub of Global Commerce