名词
中文翻译：数字
同义词：
['count', 'quantity', 'magnitude', 'number of']
例句：
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1. The teacher askedus to count the books on the table.
老师让我们数桌上的书。
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2. The number of students in the class is 30.
班上的学生有30个。
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3. The number of people who came to the party was more than 50.
来参加聚会的人超过50个。