Imagine right and left clicking on a mouse that is a mirror image of the one you use.

想象鼠标放在左边和右边的感觉。

So, you left click, keep holding it down.

所以，你左键单击， 继续按住它。

So, the left click button is a command button.

因此， 左键单击按钮是一个命令按钮。

You're going to need to know what a scroll is, what right click, left click, etc.

您将需要知道什么是滚动， 什么是右击、左击等。

Again, you're going to use your left click button.

同样， 您将使用左键单击按钮。

They - the mice or the mouse has a right click, a left click, and a scroll button.

它们 - 鼠标或鼠标具有右键单击、左键单击和滚动按钮。