The VFS keeps track of the currently-supported file systems, as well as those file systems that are currently mounted.

VFS记录当前支持的文件系统以及当前挂装的文件系统。

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Some consumer-research companies also employ goggle-mounted cameras to track eye movements so they can be sure what their subjects are looking at.

一些客户研究公司也使用带目镜的摄像头来跟踪眼动，从而确定被试在看什么。

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It is driven not by the adhesion force from the contact between wheel and rail, but by the electromagnetic force from reaction plate which is mounted in track.

它不是由轮轨间的粘着力驱动，而是由安装在轨道的反应板产生的电磁推力驱动的。

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Some consumer-research companies also employ goggle-mounted cameras to track eye movements so they can be sure what their subjects are looking at.

ECONOMIST: Facial monitoring

It tapped directly into long summer rides to Jones Beach with the dash-mounted eight-track blasting, to boom boxes in the Rockaways and Beach Haven, and turntables in back bedrooms of ethnic neighborhoods in the Bronx, Brooklyn, Queens and the burbs.

FORBES: The Night The Who Saved New York

He said small bio-metric monitors, mounted on chest belts, had been sent down to the miners to help keep track of their physical condition.

CNN: STORY HIGHLIGHTS