名词
中文翻译：监视者
同义词：
['guardian', 'watchman例句：1. The policeman waswatching the street for any suspicious activity.（警察在街头监视任何可疑活动。）']
例句：
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1. The policeman waswatching the street for any suspicious activity.
警察在街头监视任何可疑活动。
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2. The babysitter is a watch guard at thechildren's home.
看护员是儿童之家的守卫。
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3. The security guard stoodby the door, ready to intervene if needed.
保安站在门口，随时准备介入。