未定义区域(Undefined Area)：折回、重复边缘像素。
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undefined area
未定义区域
以上为机器翻译结果，长、整句建议使用 人工翻译 。
However, if you modify the area of the tree that contains the node receiving the event, the events that you receive and the impact to the tree are undefined.
但如果修改的区域属于包含正接收该事件的节点的树，则接收的事件和对树的影响是不确定的。
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It's a new approach to an area of international trade that is still largely undefined.
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