USAC

例句：

1. 1. The USAC is responsible for the safety of all personnel on board.
   USAC负责所有人员在飞机上的安全。
2. 2. The USAC conducted a thorough investigation into the incident.
   USAC对这起事件进行了彻底的调查。
3. 3. The USAC is expected to provide valuable insights into the future of aviation.
   USAC预计将提供有关未来航空的重要见解。