Tracking files get onto websites, and downloaded to a computer, in several ways.

追踪文件上传到网站，然后又以几种方式下载到计算机。

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It then analyzed the tracking files and programs these sites downloaded onto a test computer.

之后分析了由这些站点下载到测试计算机上的追踪文件及程序。

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The tissue library is also protected against loss and misplacement by a meticulous computer tracking system that involves bar codes and human-readable numbers.

为了防止损耗和误放，组织实验室也利用了涉及条码和登记号的计算机追踪系统来保护实验室安全。

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The original grand vision of Tobii's founders was to put eye-tracking technology into every computer, but there are some that wonder if eye-tracking might be the next Bluetooth, useful but not widely used.

CNN: Watch this space: Eye-control to give technology a new look

As we stand in the Thames Barrier control room, computer screens tracking the waves out in the North Sea, I ask him about the value of remembering the catastrophe of 1953.

BBC: Legacy of Britain's great flood

With several volunteers and banks of large computer monitors tracking all the trending topics and conversations surrounding New Orleans and the Super Bowl online, the social media team followed everything from NFL specifics to transit logistics in New Orleans.

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