elastic forceＳ 基本例句 弹力 买围巾帽子力 Through the analysis of the case that the weight chain slides down on the smooth plane of right angle, the action of elastic force N of table angle on the motion of the weight chain is explained. 通过分析重链沿光滑直角面下滑过程中的运动情况，阐述了桌角弹力及其对重链运动所起的作用。 cnki