In motions of rotation angular momentum appears in much the same way as linear momentum appears in motion of translation.
在旋转运动中的角动量产生的方式与平移运动中的线动量的产生是基本相似的。
And, in general, if you have a complicated motion some of it might be, you know, there is a translation.
一般地，如果有一个复杂的运动，有一个平移。
Under the action of wind loading, motion coupled with translation and torsion will occur for unsymmetrical structures.
不对称结构在风荷载作用下，将引起平移和扭转的耦合运动。
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