Memory is allocated from the monitor heap when you perform database monitoring activities such as taking a snapshot, turning on a monitor switch, resetting a monitor, or activating an event monitor.
当执行数据库监视活动时，将从监视堆分配内存，这些活动包括拍摄快照、打开监视器开关、重置监视器或激活一个事件监视器。
Brain exercise: Imagining an event in a book is as good at activating the brain as actually 'doing' it.
大脑练习：想象书中的一件事对于活动大脑来说，和实际做了此事的效果一样。
Any control valves must show their action in the event of a failure of the activating energy.
所有的控制阀，必须标明出事故时使它们动作的触发能量。
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