A type of semaphore that is used to track multiple resources of the same type.

一种用来跟踪多个相同类型资源的信号灯。

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If you are doing a tape-based backup, dump will automatically track multiple volumes.

如果您在执行基于磁带的备份， dump 会自动跟踪多个卷。

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The reason for this is that we use Twitter extensively to do our jobs and tend to track multiple lists and searches at the same time.

其原因在于我们在工作中要广泛使用到Twitter，而且往往必须同时追踪多个列表并搜索。

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Each device can be linked to multiple phones, and each phone can track multiple devices (as with family applications).

ENGADGET: Trakdot Luggage hands-on: find your lost bags Hands-on

Each phone can also track multiple devices (as with family applications).

FORBES: Afraid of Losing Your Luggage? Track It With Trackdot

Proximo delivers a unique way to track multiple valuables with a last-seen map pin-drop feature, an active proximity dashboard and extended battery life on both its Fob and Tag.

ENGADGET: Kensington wants you to be very afraid of losing your iPhone, buy its $60 Proximo system