For example, you can define a threshold alert to be triggered if your Buffer Pool Hit ratio drops to below 60% for a warning level or 55% for a problem level.
例如，您可以定义当BufferPoolHitratio下降到低于60%时触发一个警告级阈值提醒，或者低于55%时触发一个问题级阈值提醒。
When the voltage in the capacitor reached a certain level, it triggered the transistor; the transistor turned on, and the wipers wiped once.
当电容器电压达到一定程度，它便会激活晶体管；晶体管打开，雨刷运转一次。
Japan itself had a Level 4 accident in 1999, when three workers preparing fuel for a reactor at a Japan Nuclear Fuel Conversion plant triggered a nuclear chain reaction, called a criticality.
日本在1999年就曾发生过一次4级核事故（又称“东海村核事故”——译注），当时在日本核燃料转换公司（Japan NuclearFuel Conversion）的一个燃料厂内，三名正在为反应堆准备燃料的工人引发了一次链式核反应，使反应堆达到临界状态。
But at what level should alarms be triggered?
但该在什么水平拉响警报？
Allowing users to specify when outbound events should be triggered from low-level monitor models to a high-level monitor model.
允许用户指定出站事件从低级监测模型发送到高级监测模型的触发时间。
The W. H. O. has no power to enforce any policies on member states, but different countries may have their own pandemic flu plans that are triggered by changes in the alert level.
世界卫生组织无权强制会员国执行，但是在警戒级别调整后不同的国家可能有启动他们自己的防流感计划。
If the who declares the swine flu alert should move up from the current phase 5 to the highest level of phase 6, a whole raft of new measures and precautions will be triggered.
如果世卫组织宣布猪流感警戒级别从目前的5级提升到6级，则一系列新的控制和预防措施将被启用。
If the who declares the swine flu alert should move up from the current phase 5 to the highest level of phase 6, a whole raft of new measures and precautions will be triggered.
如果世卫组织宣布猪流感警戒级别从目前的5级提升到6级，则一系列新的控制和预防措施将被启用。
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