pro·trac·tor 
(prō-trăktər, prə-)
(prō-trăktər, prə-)n.
1. A semicircular instrument for measuring and constructing angles.
2. Anatomy A muscle that extends a limb or other part.
| 单词 | protractor |
| 释义 | pro·trac·tor (prō-trăktər, prə-)n. 1. A semicircular instrument for measuring and constructing angles. 2. Anatomy A muscle that extends a limb or other part. |
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