Hence, all we need is one point, the lower left-hand point will do, and the height and width of the rectangle.
于是,我们所需要的就是一个点,左下角的点就可以,以及长方形的高度和宽度。
Because we chose to float the sidebar, there comes a point when the sidebar will flip under the main content area when the width of the viewport is too narrow.
因为我们选择让边栏浮动,所以当浏览器窗口的宽度太窄时,边栏会出现在主内容区域下面。
And if you don't put a point but just put a number, this specifies the width of space that will be used by the number you're inserting there.
如果你不用点而只用数字,这个指定的长度是由,你插入的数字决定的。
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