航线的英文air line。
造句：Is it mix up with another air line?
会不会和别的航线的行李混在一起了。
Should the air line sell it to him?
航空公司应该将这个座位卖给他吗？
This air line operates five main lines and twenty branch lines.
这家航空公司经营五条主干线和二十条支线。
Excuse me. Could you tell me where I can get air line tickets?
