The only time it's called for is in a form that the same user USES over and over again with different input. If you use a Reset, also try to provide an undo function.

唯一的可能是他们在表单中需要它们，是同一个用户反复再三做不同输入的时候，即一旦你使用了“重置”，也就意味着为用户提供了一个撤回功能。

youdao

The standard library, that first line of code, it's not strictly necessary but any time you use a function, a tool that someone else wrote that lives in that so called library, you do need that include line as we'll see.

标准库函数--第一行代码，严格来说，不是每次都要写的，但是一旦你调用某个别人写，的函数，而这个函数又恰巧位于标准库里面,你就要像我们看到的这样，把它include进去。

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