The sum of any two elements has an even number of prime factors . 其中任何两个元素之和有偶数个素因子。
"two" is a pair . “2”是偶数。
Prove that if n is not a square then it has an even number of divisors . 证明:若n不是完全平方数,则n有偶数个因数。
A circ is an undirected graph having only vertices of even nonzero degree . 一广义圈是一无向图,其顶点次数都是非零偶数。
The permutation is even if the number of inversions it contains is even . 如果一个排列中含有的反序的个数是偶数,则称它为偶排列。
The sum of all the degree is 24, an even number, which is twice the number of edges . 所有次数的和是24,是个偶数,它是边数的两倍。
If a rectangle can be covered using these tiles then covering uses an even number of tiles . 如果一个矩形可用这种瓷砖盖住,那么所有的瓷砖一定是偶数。
The type of intensity alternation(whether the even or the odd lines are strong)is determined by another important nuclear property . 强度更迭的类型(偶数谱线强还是奇数谱线强)取决于另一个重要的原子核性质。
The type of intensity alternation(whether the even or the odd lines are strong)is determined by another important nuclear property . 强度更迭的类型(偶数谱线强还是奇数谱线强),取决于另一个重要的原子核性质核统计法。
A big even number as the sum of two odd prime numbers 大偶数可表示为两个奇素数之和