靠近每一个绘制转换中心的是一个分支节点。
流程图只有少数分支节点
分支节点识别决策点,并直观地表示为位于相关箭头(转换)上的黑框。
A branch node identifies the decision points and is visually represented as a black box located on the associated arrow (transition).
At each node, I'm going to go left until I can't go any further.
在每一个节点,我都会先走左边的分支,直到走不下去。
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