订座未搭乘的人预订了座位，如飞机，但既未使用也未取消订座。
A person who reserves a place, as on an airplane, but neither uses nor cancels the reservation.
未担保的预订，房间将保留到抵达当日的下午六时。
Reservations not guaranteed will be released at 6pm of scheduled arrival.
未担保的预订，房间将保留到抵达当日的下午六时。
Reservations not guaranteed will be released at 6pm of scheduled arrival.
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