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线积分的意义，就是这力所做的功。
The line integral was actually the work done by the force.
youdao
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功等于力乘以物体运动的距离。
Work equals the force multiplied by the distance a body moves.
youdao
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功等于力乘以物体运动的距离。
Work equals the force multiplied by the distance a body moves.
youdao