There are plenty of places around the globe where people have no access to heavy machinery but do know how to deal with wind, sailing and basic mechanical principles.

在世界上有很多地方，人们都无法使用重型机械，但却知道如何处理风力、航行和基本的机械原理。

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A device that works on mechanical principles.

在机械原理下工作的装置。

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The strain gage based on mechanical principles is the scratch gage.

以机械原理为基础的应变计是刻痕应变计。

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Biomechanics is the term used to describe mechanical principles of living organisms.

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For example, there was very little understanding of how a human walks on two legs, and to utilize those principles to create a mechanical model.

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