[] an arrangement between airlines that allows them to carry each other's passengers and use their own set of letters and numbers for flights provided by another airline代码共享（一家航空公司的航班号，即代码，可以用于另一家航空公司的航班上）◆a code-sharing agreement between KLM and British Airways荷兰皇家航空公司与英国航空公司之间的代码共享协议