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。
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.
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。
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.
大部分来说计算机，这一个地方是硬盘磁碟机，但是文件能在所有的媒体上存在：闪现驾驶、激光唱碟和数字化视频光圆盘，否则甚至以带子绑起预备的系统。
For most computers, this place is the hard disk drive, but files can exist on all sorts of media: flash drives, CD and DVD discs, or even tape backup systems.
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