But because the extension of the rubber band is not directly proportional to the external force, the scale of the rubber band can not be divided equally.
但由于橡皮筋的伸长与所受外力不成正比，故不能等分地进行刻度。
But because the extension of the rubber band is not directly proportional to the external force, the scale of the rubber band can not be divided equally.
但由于橡皮筋的伸长与所受外力不成正比，故不能等分地进行刻度。
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