... 划破 laceration 划界 to delimit boundary 划分 to divide ...
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to delimit boundary
划定边界
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Because of the special geomorphology in areas of shallow overburden, it is difficult to delimit the boundary between mapping units in regional geological mapping.
由于浅覆盖区的特殊地貌，给区域地质填图带来一定的困难。
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