strain forces

例句：

1. 1. The car's engine is straining to reach full throttle.
   汽车的引擎正在努力达到全功率。
2. 2.The team needs to work together to overcome the strain of competition.
   团队需要共同努力来克服竞争的压力。
3. 3. The strain forces are causing the metal to bend and twist.
   应力导致金属弯曲和扭曲。