名词
中文翻译：数字
同义词：
['count', 'quantity', 'magnitude', 'amount', 'quantity of']
例句：
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1. The number of students in the classis 30.
班上的学生有30个。
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2. The number of cars on theroad has doubled since last year.
路上的汽车数量从去年增加了一倍。
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3. The numberof people who have signed up for theevent is increasing daily.
报名参加该活动的人数每天都在增加。