注意② k is divisible by exactly four different prime numbers.
是说k可以被4个不同的质数整除,并不是说k由四个不同的质数构成(就算是这样也不行:2,2,3,3,5,5,7,7).
可被四个不同的质数整除:2,3,5,7,2(比如由这5个数相乘)
in Runagia children typically supplement the income of elderly parents, but only by enough to provide them with a comfortable living
孩子给的钱是变化的,只要provide them with a comfortable living,就不给了,说明老人的生活水平始终没有啥变化
注意② k is divisible by exactly four different prime numbers.
是说k可以被4个不同的质数整除,并不是说k由四个不同的质数构成(就算是这样也不行:2,2,3,3,5,5,7,7).
可被四个不同的质数整除:2,3,5,7,2(比如由这5个数相乘)