名词
中文翻译：单元
同义词：
['piece', 'part', 'section', 'unit', 'quotient']
例句：
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1.The clock is set to the hour of twelve.
时钟设定为十二点。
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2.The teacher asked us to divide the class into five groups.
老师要求我们把班级分成五组。
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3.The scientist conducted a series of experiments to find the quotient of the equation.
科学家进行了一系列的实验来找出这个方程的商。