1. 张力：stretch 伸长 | stretching force 张力 | stretching pulley 张力轮
2. 拉力：stretching 伸展 | stretching force 拉力 | stretching quadric 拉伸二次曲面
3. 张拉力：应力 stress | 张拉力 stretching force | 规范上限 upper limit in code
4. 拉力,张力：stretching effect ==> 拉伸效应 | stretching force ==> 拉力,张力 | stretching hammer ==> 锻扁锤
1. It is through stretching upward or downward of this force that breeds conflict and power.