饭店或航班已超员预订。

The hotel or the flight is overbooked.

youdao

第一个部分，起始select语句，预先定义了起始点(如组织图中的管理人员或航班中转里的起航)。

The first part, the initial select statement, predefines the starting point (e.g. the manager in an organization chart or the departure in a flight connection).

youdao

你必须知道航班什么时候起飞或取消。

You must know when to fly or cancel the flight.

youdao