当你移动得更快时，它的速度也会减慢，这意味着有一天宇航员可能会在太空中生存很长时间，以至于在遥远的将来他们才会回到地球。
It also slows down more as you move faster, which means astronauts some day may survive so long in space that they would return to an earth of the distant future.
一个潜在的问题是，张嘴呼吸会减损这些鱼类的流线型，可能使它们的速度减慢。
One potential problem is that opening the mouth to breathe detracts from the streamlining of these fishes and tends to slow them down.
这种摩擦往往会减慢风的速度，使它们吹散污染物的效率大大降低。
This friction tends to slow the speed of winds, making them far less efficient at dispersing pollutants.
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