名词
中文翻译：Unknown
同义词：
['quantity', 'amount', 'magnitude']
例句：
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1. The number of students in the class is 50.
班上的学生有50人。
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2. The quantity of apples in the basket is 10 kilograms.
篮子里的苹果重10公斤。
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3. The magnitude of the earthquake was felt throughout the city.
地震的强度在整个城市都能感受到。