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词汇	protractor
释义	protractor Word family  adjectiveprotractedprotractileprotractiveadverbprotractedlynounprotractionprotractorverbprotract   Related topics: Maths pro·trac·tor /prəˈtræktə $ proʊˈtræktər/ noun [countableC]   HMa piece of plastic in the shape of a half-circle, which is used for measuring and drawing angles 量角器，分度规 → set square →4  See picture of 见图 MATHEMATICS →5 see picture at 见图 mathematics Examples from the Corpus protractor• Moira screamed and ran away from him, dropping several books and a protractor.• After all, this is the unit used on the protractor that we first came across early in our school careers.
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