时钟的工作就是依靠钟摆从一个极端摆向另一个极端。
That's how the clock runs, by the pendulum moving from one extreme to the other.
因为有长钟摆，最初的时钟是放在墙上的搁板上，再在搁板上钻个洞把长钟摆穿过去。
At first this meant that clocks were set on shelves high on the wall with a hole cut in the shelf for the pendulum to hang through.
如果钟摆停在中间，那就是爱的清凉；如果钟摆停在中间，时钟也停下不走了。
If the pendulum stops in the middle, it will be the coolness of love; and if the pendulum stops in the middle, the clock will also stop.
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