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名词
n. （中小学）学生
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someone who is learning in school or from a private teacher
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There are twenty pupils in the class.
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这班上有二十个学生。
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She has thirty pupils in her English class.
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她的英语班上有三十个学生。
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名词
n. 瞳孔
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the dark opening in the center of the eye.
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The pupil becomes smaller in bright light and larger in dim light.
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光线强时瞳孔变小，弱时变大。
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