The video reports a new study using an eye-tracking device.

视频报道了一项使用眼球追踪设备的新研究。

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Before, he had put a tracking device in it, which is how they found him.

原来，他早先放置了一个跟踪装置在电脑里，所以他们才能找到他。

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The FBI reports indicate agents likely turned to the GPS tracking device after it became increasingly difficult to tail her physically.

FBI的报告显示，特工们在对一个人跟踪越来越困难时，倾向于使用GPS跟踪设备。

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Hormann took her car to a mechanic who discovered and removed the tracking device.

FORBES: Scary Stalker Husband In The Legal Clear To Track Wife's Car

Detectives planted the bug anyway - telling the French it was a tracking device.

BBC: Jersey drug police 'illegally bugged' Curtis Warren

The FDA admits as much, acknowledging "inadequacies" and "shortcomings" in tracking device safety and vowing to overhaul its approach.

FORBES: Magazine Article