This is typically used to detect network failures (cable, switch, router, and so on) where the processes stay running but the communication between them fails.

这通常用于检测网络故障(电缆、交换机、路由器，等等)，其中进程仍然运行但它们之间的通信失败。

youdao

The system will also be able to detect various other bad smells - such as from animals and factories - and will automatically switch the ventilation on if required.

该系统还有探测各种来自动物或工厂不良气味的功能，并且能够按照需要自动打开换气装置。

youdao

The component of system, locale disposal of detect switch and design of system program have been described in details.

详细阐述了系统的组成，检测开关的现场布置以及系统程序的设计。

youdao

Keeping with the contextual phone skills, Samsung's Smart Stay feature makes the device detect (through the front-facing camera) whether a face is looking at it in order to switch the display on or off.

ENGADGET: Samsung Galaxy S III preview: hands-on with the next Android superphone (video)

Scientists have used chromophores for decades to detect chemicals, but, until Fido, they weren't sensitive enough to detect trace explosives because each molecule of TNT vapor would switch off just a single chromophore, with the result that faint wisps of evil chemicals caused no visible change in luminosity.

FORBES