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BNC: 29824 COCA: 38827
protractor
prətræktəʳ proʊ- ˈproʊˌtræktər proʊˈtræktər
Word forms: plural protractors
N-COUNT 量角器;分度规 A protractor is a flat, semi-circular piece of plastic or metal which is used for measuring angles. 量角器;分度规
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BNC: 29824 COCA: 38827
BNC: 29824 COCA: 38827

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