N次的N用英文全称怎么说

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直接读n,不是缩写.

n: (MATHEMATICS)[数学]
noun [U][不可数名词]
1 used in mathematics to mean a number whose value is not known or not stated:
用于数学表示一个不未知或未给出的数
If 3n = 12, what is the value of n?
如果3乘n =12,那 n是多少?

2 used more generally to represent a number that is not known or exact
比较普遍用来代表未知或不确定的数字

(from Cambridge Advanced Learner's Dictionary)




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