绘制对象的值的表示形式。

Paints a representation of the value of an object.

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贴紧对象仅适用于你在幻灯片上绘制对象而不是你去编辑或移动它们。

Snap To object is applicable only when you are drawing objects on a slide and not when you are editing or moving them.

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调用clear清除背景后，即可通过init中创建的顶点数据和三角形绘制对象。

After a call to clear erases the background, you draw the cube by using the vertex data and triangles created in init .

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