mechanics of breathing

例句：

1. 1. The mechanics of themachine are complex and require special knowledge.
   这台机器的工作原理复杂，需要特殊的知识。
2. 2. The engineers were working tirelessly tofix the faulty parts.
   工程师们正努力不懈地修理有故障的部分。
3. 3.Mechanics often perform maintenance on carsand trucks.
   机械师经常对汽车和卡车进行维护。