Normally when patients undergo corrective laser eye surgery, surgeons use video cameras to track the position of the eye so that the surgical laser targets the right place on the cornea.

通常情况下，医生在对病人进行激光眼科校正手术时使用视频摄像机来跟踪眼球的转动，以便使激光手术刀落在正确的地方。

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A video released by the FBI Monday shows a then 24-year-old St. Louis man shining a laser at a police helicopter last year — and cops arresting him minutes later.

FBI周一的时候发布了一个去年当时24岁的圣路易斯人用激光幌射警用直升机的录像，几分钟后这人就被警方逮捕了。

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They use a system of video cameras, radar sensors and laser range-finders to detect other vehicles, while following a pre-set route mapped out by drivers in ordinary cars.

这些汽车利用一套包括视频摄像机、雷达传感器和激光测距仪在内的控制系统侦测道路上的其他车辆，同时按照由普通汽车驾驶员制定的预先设定路线行驶。

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But the Lake District National Park Authority, which intends to enforce the limit by collecting evidence using digital video equipment, still cameras and a laser gun, believes it marks a new future for Windermere.

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In the video, the major appears to be upbraiding the soldier for not using a laser warning device to signal the approaching truck.

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Anderson would consider putting a computer chip in the ball and a laser on the goal line to replace the time-consuming debates and video reviews of scoring.

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