1)ATC;air traffic control,空中交通控制2)air traffic control (ATC),空中交通控制（ATC）3)automatic air traffic control computer,自动空中交通控制计算机4)in-flight,空中5)air powder,空中粉尘6)Air striking,空中打击7)driving birds in air,空中驱鸟8)vertical sampling,空中采样9)Air transportation,空中转运10)air medical emergency,空中急救
用法和例句
Developed a high-powder,efficient and practical air powder vacuum cleaner after studing its working principle in order to suck up air powder,the vacuum cleaner is vevy practical.