a number of an amount of a quantity of区别RT

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a number of an amount of a quantity of区别RT
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a number of an amount of a quantity of区别RT
a number of an amount of a quantity of区别
RT

a number of an amount of a quantity of区别RT
a number of 加复数名词
an amount of后面 经常加不可数名词
a quantity of 加可数或不可数名词 皆可