As you can see, we have a button that calls a function.

你可以看到，我们有一个按钮，调用一个函数。

youdao

For example, let's say we don't want our buttons to have the default rectangle push button look, and instead we want them to have a custom round button look like below.

例如，我们不想要我们的按钮拥有一个默认的长方形的按钮的外观，而是要它们有一个象下面这样的自定义的圆形按钮外观。

youdao

All we will have to do is press a button, and the coal will just come up by itself, "said Zhao."

我们只需按下按钮，煤就会自己运上来。

youdao

We want to have an effect: Push a button and make a mark that others can acknowledge.

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