constant speed propeller

例句：

1. 1. Theaircraft's constant-speed propeller is the key to its successful flight.
   飞机的恒定速度推进器是其成功飞行的关键。
2. 2. The constant-speed propeller ensures that the ship can maintain a steady speed even in rough waters.
   恒定速度推进器确保船只即使在恶劣的水域也能保持平稳的速度。
3. 3. The constant-speed propeller was designed to improve fuel efficiency and reduce emissions.
   恒定速度推进器的设计旨在提高燃油效率并减少排放。