There is potential energy in that spring.
弹簧中储存了能量。
In that spring, I decided to go home.
在那个春天,我决定回家了。
Now it is spring in the northern part of the world so it is time to celebrate that season.
VOA: special.2010.03.15
suppose I asked you to time a 100 meter spring in the Olympics, but I give you a stopwatch that is measured in units of 15 seconds?
如果我要求你,在奥林匹克数给100米短跑计时,但我会给你一个秒表,它可以测出15秒的大小?
You cannot have a spring pulled only at one side, because then it will then accelerate with infinite acceleration in that direction.
你不可能对弹簧只施加一边的拉力,因为那样的话弹簧就会以无穷大的加速度加速,就在这个方向上
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