cyclic fatigue

例句：

1. 1. The machine's cyclic fatigue is causing it tofail prematurely.
   这台机器的循环疲劳导致它提前失效。
2. 2. Thecyclic fatigue of theengine is a common problem inheavy-duty vehicles.
   发动机的循环疲劳是重型车辆中常见的问题。
3. 3.The cyclic fatigue of the material wasnot considered during the design phase.
   在设计阶段没有考虑到材料的循环疲劳。