单词unstretched
网络: 未拉
I left the elastic unstretched in the back portion and then stitched over it along the seams to hold it in place.
我离开了在后部弹性无拉伸，然后沿缝缝在它举行的地方。
If the force P is reduced or made zero, the elastic force will restore the spring to its original unstretched condition.
如果力P减小或变为零，那么弹性力就使弹簧恢复当初的未伸长状态。