stretching swaging

例句：

1. 1.The rope was stretched taut over the tree.
   绳子被拉紧系在树上。
2. 2.The car's engine is stretching its power.
   汽车的引擎正在发挥其力量。
3. 3.The muscles in his arms are stretching to their full length.
   他的手臂肌肉正在完全伸展。