Database monitors provide large amount of the information to the DBAs about database and the application accessing the database. Different monitor group switches are listed below.

数据库监控器向DBA提供了关于数据库和访问该数据库的应用程序的大量信息。

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It monitors from 1 to 150 Amperes and switches up to 135 volts AC or DC.

它可以监测从1到150安培的电流，且能转换最高135伏的交流或直流。

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A digital engine control system automatically monitors the engine parameters and automatically switches on the back-up systems if required.

RM 12由一个数字式发动机控制系统来自动检测发动机参数，并根据情况需要自动调整推力。

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Here is what we got for our tax dollars: automated feeder monitors and switches, a few widgets for the transmission system and a whole heap of smart meters.

FORBES: How Smart Grid Spending Is Skewed