名词
中文翻译：Unknown
同义词：
['count', 'quantity', 'magnitude例句：1. The number of students in the class is 30.（班级里的学生有30个。）']
例句：
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1. The number of students in the class is 30.
班级里的学生有30个。
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2. The number of stars in the sky is infinite.
天空中的星星数量是无限的。
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3. The number of cars on the road has doubled since last year.
路上的汽车数量从去年增加了一倍。