英语类语法问题For a finite sequence of nonzero numbers,the number o

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英语类语法问题
For a finite sequence of nonzero numbers,the number of variations in sign is defined as the number of pairs of consecutive terms of the sequence for which the product of the two consecutive terms is negative这个句子当中for which 是什么一个成分,如何翻译的?虽然大致知道意思,但还是感觉不那么直接

对于有限的非零数字的序列,其符号变化的次数被定义为序列中乘积为负数的相邻元素对的个数.

which是指代pairs.for which 引导的是定语从句,修饰pairs,是这种特定的数对的个数.
定语从句还原后为：the products of the two consecutive terms for the pair is negative.
元素对中相邻两元素的乘积为负.

a number of,the number of,numbers of,the numbers of ,的区别 a number of 和 numbers of的区别英语 The number obtained from the last two nonzero digits of 90!i 数学分析：construct a sequence (tn) of real numbers according to a number of,numbers of,the number of的用法及区别 numbers 和a number of ,the number of有什么区别? numbers of是不是等于a number of 英语翻译这句子是The n(th) term of a number sequence is given by form a sequence of number is like this:2,5,9,14,20,27...then the 英语翻译1.我们今天学英语的原因是我们都有一些语法问题2.区别THE NUMBER OF 和A NUMBER OF各造一 a number of,numbers of,large number of区别 the number of 和numbers的区别