例句
The helicopters have two rotors for stable flight.
直升机有两个转子以实现稳定飞行。
The rotor of the wind turbine is turning rapidly.
风力涡轮机的转子正在快速转动。
The helicopters have two rotors for stable flight.
直升机有两个转子以实现稳定飞行。
The rotor of the wind turbine is turning rapidly.
风力涡轮机的转子正在快速转动。