然而，如果一个合同工在你家里工作，你不需要告诉他们有摄像头在监视。
However, if a contractor is working in your home, you don't need to tell them that there are cameras watching.
这个会说话的机器人伴侣眼睛里装有摄像头，可以监视病人，并在互动过程中使用恰当的面部表情和肢体语言。
This conversational robot companion has cameras in its eyes, which allow it to track patients and use appropriate facial expressions and body language in its interactions.
科学家们在六头亚洲象身上安装了压力传感器，并通过高速红外线摄影机监视它们通过一条人行道时候的步态。
Six Asian elephants walked or ran over a sidewalk equipped with pressure sensors, as the scientists used high-speed infrared video cameras to monitor their gait.
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