每一脚标指的是代表一个力或一个位移的位置和方向的坐标。

Each subscript refers to a coordinate which represents the location and direction of a force or of a displacement.

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每一脚标指的是代表一个力或一个位移的位置和方向的坐标。

Each subscript refers to a coordinate which represents the location and direction of a force or of a displacement.

youdao