deflection一词在力学里是什么意思?它的定义是什么? 英语
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【答案】 3.(Physics / General Physics) the change in direction of a light beam as it crosses a boundary between two media with different refractive indexes
4.(Physics / General Physics) a deviation of the indicator of a measuring instrument from its zero position
5.(Engineering / General Engineering) the movement of a structure or structural member when subjected to a load