rotorcraft

例句：

1. 1. The military uses helicopters for reconnaissance missions.
   军队使用直升机进行侦察任务。
2. 2. The research team is developing a new type of rotorcraft.
   研究小组正在开发一种新型旋翼机。
3. 3. The pilot was able to land the rotorcraft safely after the crash.
   飞行员在坠机后能够安全着陆旋翼机。