By using strict mechanical analysis and mathematical treatment, three rock-bit interaction models reported in literature are analyzed.

本文通过力学分析与数学推导，对已有的三种钻进模型进行了分析推理。

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It still is a difficult subject for most drilling engineers to predict and control well path by applying the mechanical analysis of bottom hole assembly and the rock-bit interaction model.

利用下部钻具力学分析和钻头与地层相互作用模型来预测和控制井眼轨道对于大多数钻井作业来说仍是一个难题。

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So it was the best bit of, I think, human interaction where money's not involved.

所以，我觉得那里最美好的是，人们之间那种不掺杂金钱关系的交往。

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You can rouse it back with a little bit of interaction.

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After only a few weeks with it, just about every bit of content I disseminated during the day, which was not conveyed through personal interaction, was done through this phone.

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