If, for example, your opponent threw rock twice in a row, your next play should be scissors - at best it wins if he plays paper, at worst it ties if he plays scissors.

例如，如果你的对手出了石头两次，你下一个出的应该是剪刀——好的情形下，如果他出步，你会赢；最坏的情形可能是他出剪刀，成平手。

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The ideal rock sample is the conical surface rock sample that can joint crest of teeth in single row drilling experiment.

在单齿圈破岩试验中，理想的岩样是与牙齿齿顶线相贴合的锥面岩样。

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However, because of lacking high efficiency and high precision for the measurement of craters on the conical surface rock, the traditional single row drilling experiment is carried out on planar rock.

由于缺乏对锥面岩石破碎坑的有效的、高精度的测量手段，所以传统的单齿圈试验都是针对平面岩样进行的。

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