You can make a pendulum for yourself with a cord and a weight of any kind.

你自己也可以用绳子和任意一种重物制作一个钟摆。

youdao

You can make a pendulum for yourself with a cord and a weight of any kind.

你自己也可以用绳子和任意一种重物制作一个钟摆。

youdao