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。
They are one of the first plants that grow in the spring, usually between April and May.
它们是最早在春天生长的植物之一,通常在4月到5月之间。
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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