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protractor

n.量角器
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单词:protractor的图片解释

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protractor为短语/超纲词汇

词根

tract,treat=to draw(拉曳)

protractor


/prə'træktə(r); [US] prəʊ-; pro`træktɚ/
n instrument, usu in the form of a semi-circle with degrees (0 to 180) marked on it, used for measuring and drawing angles 量角器; 分度规.

protractor


n[C]

a piece of plastic in the shape of a half-circle, which is used for measuring and drawing angles