This demo is quite simple: It has one large button, the width of which is decreased when clicked, and a small one which has an increasing width.
这个例子非常简单：它有一个大按钮，每次点击时宽度逐渐缩小，还有一个小按钮每次点击时宽度逐渐增加。
One button can adjust the width; one, the height; and one, the background colour.
一个按钮用来调整宽度，一个用来调整高度；还有一个用来调整背景颜色。
Ed pushes a button, activating a motor that causes one side of the floor to slide outward, doubling the vehicle’s width.
爱德按个按钮，启动一个装置把地板往外延伸到有两个车身那么宽。
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