1. The aircraft must undergo rigorous testing to ensure it is the airworthiest in the fleet.

这架飞机必须经过严格的测试，以确保它是机队中最适于飞行的。

2. The maintenance crew worked diligently to keep the plane in its airworthiest condition.

维修人员努力工作，以保持飞机在最适于飞行的状态。

3. The pilot certified that the aircraft was in its airworthiest state before takeoff.

飞行员在起飞前证明飞机处于最适于飞行的状态。

4. The airline prides itself on having the airworthiest planes in the industry.

这家航空公司以拥有行业中最适于飞行的飞机而自豪。

5. The engineers conducted thorough inspections to ensure the aircraft remained airworthiest.

工程师进行了彻底的检查，以确保飞机保持最适于飞行的状态。

6. The aviation authority requires all planes to meet strict criteria to be considered airworthiest.

航空管理机构要求所有飞机都要符合严格的标准才能被认为是最适于飞行的。