英语词汇“silent policeman”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	silent policeman
释义	silent policeman noun Australian /NZ A traffic-control device in the form of a raised dome set into a road surface at junctions and on corners to control speed and positioning: the silent policeman is visible in the middle of Chestnut Street... They intended the silent policeman to expedite traffic, but it did not. In an effort to control traffic flow, many towns installed a silent policeman. The silent policeman is visible in the middle of the street.
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