So here, again, is our simplest oscillating system: a block and spring.

因此，在这里，扔是我们最简单的振动系统：一个物块和弹簧。

youdao

Now that spring is here, you can put away these fur coats till you need them again next winter.

春天了，你可以把毛皮大衣收起来，下个冬天需要时再拿出来穿。

youdao