IM 用户必须登录的状态指示器系统需要更多基础结构。
The presence indicator systems that IM users must log into required more infrastructure.
DB 2“Stinger”中的大多数指示器都是基于阈值的，它们关联着与系统健康状态有关的一些上界和下界，如图3中所示。
Most indicators in DB2 V8.2 are threshold-based and are associated with upper and lower bounds that relate to the health of a system as shown in Figure 3.
指示器指示器作为一个附属装置常用于远程显示系统的各个组成部分的运行状态。
Annunciator an annunciator is an accessory device used to give remote indication of the status of an operating component in a system.
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