巨观尺度下材料机械性质之现象学。

Phenomenology of mechanical behavior of materials at the macroscopic level.

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为某一工具选择特有的材料，通常由该工具在正确的操作下所需的机械性质决定。

The specific material selected for a particular tool is normally determined by the mechanical properties necessary for proper operation of the tool.

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我们倾向于认为人们选择金属材料、陶瓷材料、纤维材料是根据它们在特定用途的条件下的物理性质，如机械性表现。

We tend to think that societies choose materials-metals, ceramics, fibers - according to their physical qualities such as mechanical performance, under a given set of conditions of use.

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