动词
中文翻译：监视
同义词：
['observe', 'monitor', 'spy on', 'watch over']
例句：
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1. The police are constantly surveilling the area for any suspiciousactivity.
警方一直在这个区域巡逻，以防任何可疑活动。
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2. The spy was able tosurveil the target's everymove without being detected.
间谍能够不被发现地监视目标的每一个动作。
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3. Themilitary is conducting athorough surveillance of the border.
军队正在对边境进行彻底的监控。