Similarly, high-level events can be decomposed into one or more low-level events or actions; for example, changing a pressure control valve, sounding an alarm, or signaling an alert.

类似地，高层次事件能够被拆分成一个或者多个低层次事件或动作；例如，更换压力控制阀、拉响警报或发出警戒信号。

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Test results show that the proposed double-objective detection system can monitor and identify accurately a driver's alert level with high fault tolerance provided.

结果表明，双目标监测系统能够实时、准确地监测和识别驾驶员的觉醒水平，具有较高的识别容错性和准确性。

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Reviewing any detected items displays the name of the malware, its alert level (low, medium or high) and a recommended action (remove, quarantine or allow).

查看任何检测到的项目显示的恶意软件、 其警报级别 （低、 中、 高） 和建议的操作名称 （删除、 隔离或允许）。

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To an extraordinary extent -- and with good reason -- the city considers itself on permanent alert, with a high level of vigilance that is our best protection.

CNN: Terror in N.Y.? Whaddya gonna do

The nation's civilian "high" alert -- the second highest level of warning -- was put in place Tuesday.

CNN: Al-Jazeera airs purported al Qaeda message

Federal officials lowered the nation's health alert level Monday from red, or "high, " to orange, or "elevated, " and said university and secondary students can return to class Thursday while younger students will wait until May 11.

CNN: Mexican citizens to return from China