Therefore the "servant class" has not remained a fixedgroup.
因此,仆人阶级并非一个固定不变的团体。
2
Making an appointment conforms the rule that early book early play, and strictly forbid transferring the fixedgroup.
预约遵循先订先得原则,严禁擅自调动已订组。
3
What we usually want is a work queue combined with a fixedgroup of worker threads, which USES wait and notify to signal waiting threads that new work has arrived.