Definition: any vehicle, with or without an engine, which can fly, such as a plane or helicopter Level: B2
机场处理军用和商用航空器。
The airport handles both military and commercial ___aircraft.
他们拥有所有曾经建造过的瑞典航空器。
They have all the Swedish ___aircraft that have ever been built.
直升机是一种用于救援行动的多功能航空器。
A helicopter is a versatile ___aircraft used in rescue operations.
