The shape of the button is not perfectly circular, so you will have to use the Pen Tool to draw it.
这个按钮的形状并不是一个真正的圆，因此你要使用钢笔工具来绘制它。
Look, just draw a couple of lines here and here, click on the Run button and voila!
看啊，只需要在这里和和这里画上线，点击一下运行，瞧！
For example, a common designer mistake is to draw a rectangle or some other static element to represent a button, instead of applying a style to a button control.
例如，常见的设计器错误是绘制矩形或某些其他静态元素来表示按钮，而不是向按钮控件应用样式。
To zoom in on a specific area, use the right mouse button to draw a rectangle around the area.
若要放大特定区域，请使用滑鼠右键在该区域周围绘制一个矩形。
In the middle of their bodies on both the top and bottom, are button-shaped disks. Through these disks they draw in or expel sea water.
它们身体中间上下长有钮扣状的吸盘，用来吸进或排出海水。
In the middle of their bodies on both the top and bottom, are button-shaped disks. Through these disks they draw in or expel sea water.
它们身体中间上下长有钮扣状的吸盘，用来吸进或排出海水。
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