复数： watchdogs

What use is a watchdog that does not bark ?

但是看门狗如果不叫那还有什么用？

The press has been called the watchdog of good government .

新闻界一直被称为好政府的看门狗。

What happens when nobody hears the watchdog bark ?

要是没人听到看门狗的吠叫，会发生什么事呢？

Many watchdog timers have a maximum period of around two seconds .

很多看门狗定时器有一个大约2秒钟的最大周期。

A watchdog timer can get a system out of a lot of dangerous situations .

一个看门狗定时器能让系统免于很多危险境地的困扰。