carrier
/ˈkærɪə(r); `kærɪɚ/ n
1 person or thing that carries sth 运送某物的人或物.
2 person or company that carries goods or people for payment 运货人; 货运公司; 客运公司
Your carrier for this flight is British Airways. 你的这一班机是英国航空公司的飞机.
3 (usu metal) framework fixed to a bicycle, etc for carrying luggage or a small child （自行车等的）行李架
strap a parcel to the carrier 把包裹捆到行李架上.
4 person or animal that can transmit a disease to others without suffering from it 带菌者（可传染疾病而本身不受感染的人或动物）; 传染病的媒介
Mosquitoes are carriers of malaria. 蚊子是疟疾的传播媒介. Cf 参看 vector 2.
5 = aircraft-carrier (aircraft).
6 = carrier bag.