Then ask the question: how to empty the contents of a drop-down list?

再请教一个问题：如何清空一个下拉列表的内容？

youdao

The sachets are ready-to-use. Empty the contents directly into your mouth or on your tongue and consume.

这种小包是即食的。直接把里面的东西放入口中或者舌头上来食用。

youdao

It was, if I can give a chimpanzee language, I can empty the contents of his mind. He can tell me what he's thinking, how he sees the world.

他的想法是，如果我能交给黑猩猩一种语言的话，我就可以掏空他的想法，他可以告诉我他在想什么，他是怎样看这个世界的。

youdao

As she shook this one box which was not empty, so that the contents would settle and not spill when it was lifted, she noticed some loose sheets of writing paper lying face down.

NEWYORKER: A Beneficiary