当今世界上风行着摩托车、汽车、摩托艇和飞机等运动机械竞技活动。

Mechanical athletics such as motorcycle, automobile and motorboat are popular in world today.

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机械设计基本上是一次创造活动。

Mechanical design is basically a creative activity.

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这是绝对剪切稳定，不会瘦了从机械的活动。

It is absolutely shear stable and will not thin out from mechanical activity.

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这是绝对剪切稳定，不会瘦了从机械的活动。

It is absolutely shear stable and will not thin out from mechanical activity.

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