on the button

基本解释

We must now center the image on the button.
现在我们需要将按钮上的图像居中。
Finally, notice that we get a handle on the button we created in the layout XML and add a click event handler.
最后，注意上述代码获得一个在布局 XML 中创建的按钮的句柄，并添加一个单击事件处理程序。
Without even knowing what was involved in registration, all the users that clicked on the button did so with a sense of despair.
当不知道“注册”的后面包含着什么内容的时候，用户对点击那个按钮都抱着一种绝望的感觉。

"It been a very popular feature over the years and this year over 2.5 million people have now clicked on that button.
And if you go back to here and click on Archive Notes, it is the fourth button down that will take you to something that looks like this.
如果你们回到这来，点击存档笔记，是倒数第四个,你们会看到像这样的情况。
麻省理工公开课 - 固态化学导论课程节选
I know some of you come from Europe and other parts of the world where the ground floor is rez-de-chauss?e or some silly thing like this 1 and you push a button on the elevator to one and you go up to the first floor.
我知道你们中间有些人来自欧洲,或者世界其他地方，你们那里的一楼,和地面齐平，或者像这样可笑的事情,比如你要按下电梯的按钮,然后才能上到真正的1楼。
麻省理工公开课 - 固态化学导论课程节选

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