单词：crack length
crack length的用法和样例：
例句
- If this joint length ratio is greater than 10, the rock is likely to be blocky.采用切割法找到所有组成岩体的任何块体，基于裂隙的平均长度与平均间距，引进产生三维裂隙多边形的统计方法。
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[00:39.12]height 高度 [00:43.33]length 长度 [00:47.42]mathematician 数学家 [00:52.35]be required to do something 被要求做某事 [00:58.34]measuring tape 卷尺 [01:04.45]A team of mathematicians were required [01:06.76]to measure the heigh
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