摄像头、跟踪装置和其他监视工具的安装可以帮助制止员工的盗窃行为，但雇主们在实践中应首先回顾当地法律。
The installation of video cameras, tracking devices and other monitoring tools can also help deter workers from pilfering, but employers should first review local laws on the practice.
在志愿者观察照片时，他用红外线摄像头跟踪他们的眼球，然后要求志愿者对照片的吸引力评分。
He then asked them to rate the image for attractiveness and while they studied the photos used infra-red cameras to track their eyes.
多个摄像头捕捉的图像显示，罗森博格骑自行车出门的时间是上午8:05，一辆带棕色车窗和赛车尾翼的黑色跑车开始跟踪他。
Images caught on multiple cameras revealed that the moment Rosenberg left on his bicycle, at 8:05 A.M., a coffin-black sports car with tinted windows and a racing spoiler began shadowing him.
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