在周期轮询系统中，最基本的队列调度策略有门限服务、限定服务以及完全服务。

Limited, gated and exhaustive service disciplines are the basis for a class of queue scheduling policies used in the polling systems and each of them has its advantage and disadvantage.

youdao

单个：意味着，在给定的时间内，WCF服务实例只能处理单个的请求，其他的请求，将会等到这第一个完全服务完为止。

Single: means at a given time, only a single request can be processed by WCF service instance. Other requests will be waiting until the first one is fully served.

youdao

完全服务零售店指的是产品以零售价格，由销售人员直接销售给终端用户的零售店，在这种零售店销售人员能够解释产品价值与用途。

Full Service retail outlet a retail outlet where products are sold directly to the end user at retail prices by sales personnel who are able to explain the value and purpose of the products.

youdao

So they radically, radically limited it. They have not eliminated it.

所以说政府很彻底地限制了巴士服务。虽然他们还没有完全取消巴士服务。

纽约的公共交通 - SpeakingMax英语口语达人