1.air carrier 航空公司
例句:Cargo accepted from a foreign air carrier's direct employees or authorized representatives.
由外国航空公司的员工及授权代表交运的货物 。
2.round-trip flights 往返航班
例句:Air China canceled or delayed several round-trip flights from Beijing and Shanghai to Europe.
国航取消或延迟了数班从北京和上海往返欧洲的航班 。