点击下方单词,选择对的这个单词
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1. (尤指来自警方、军队等组织的)监视,监察Surveillance is the careful watching of someone, especially by an organization such as the police or the army.
1. close observation of a person or group (usually by the police)
多通过句子记忆单词,而不是单独死记硬背。