Definition: the part of a country's military organization that uses aircraft to fight wars Level: B1
我哥哥是一名空军飞行员。
My brother is an ___air ___force pilot.
白天你可以参观空军基地。
You can visit the ___air ___force base during the day.
该国的空军装备了现代化的飞机。
The country's ___air ___force is well-equipped with modern aircraft.
