此刻你只能有两种操作：线或弧。

You will now have two options: Line or Arc.

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图的弧边表示从一个语句(或块)到另一个语句或语句块的控制流。

Edges in the graph represent flow of control from one statement (or block) to another.

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通过拖动可向弧或圆添加尺寸。

Drag to add a dimension to an arc or circle.

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通过拖动可向弧或圆添加尺寸。

Drag to add a dimension to an arc or circle.

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