An average of 70-100 years may seem long, but it goes faster then we realize.
七十岁到一百岁的平均寿命看起来也许很长,但岁月如梭,时间过得比我们想象中要快的多。
Under special relativity, if something travels faster than the speed of light, it goes backwards in time.
根据狭义相对论,如果有什么东西比光速旅行得更快,它就会把时间向后推移。
When you use more water, it just goes around the loop a little faster.
当你的用水量加大时,也不过是稍微加快了水进入循环的速度罢了。
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