| 词汇 | protractor |
| 释义 | pro·tract·orBrE /prəˈtræktə(r)/ NAmE /prəˈtræktər/ , also/proʊˈtræktər/ noun an instrument for measuring and drawing angles , usually made from a half circle of clear plastic with degrees (0° to 180° ) marked on it 量角器;分度规 |
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