1、
Two policemen came to the door; one was uniformed and the other was in plain clothes.
两个警察走到门前, 一个身穿制服,另一个穿著便服.
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General ordinary clothes of wool flax natural primary colors very plain.
一般庶民衣服是羊毛、亚麻天然的原色,很朴素.
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As a result, the police in plain clothes, followed two people quietly into the alley.
于是, 身着便衣的民警, 悄悄地跟踪两个人进了胡同.
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