fatigue area

例句：

1. 1. The car'sengine is running smoothly, but there's a noticeable fatigue area in the gearbox.
   汽车的引擎运行平稳，但在变速箱中有一个明显的疲劳区域。
2. 2. During long flights, passengers often experience fatigue areas in theirlegs and arms.
   在长时间的飞行中，乘客经常感到腿部和手臂的疲劳区域。
3. 3.The research team identified several fatigue areas inthe design that could be improved.
   研究团队在设计中发现了几个可以改进的疲劳区域。