日期:
来源:雅诚德英语网
But 13 (as with 7 and 17) offers safety in Numbers because it is divisible only by itself and 1.
不过13(以及7和17)是安全的数字,因为它只能被它本身和1整除。
But 13 (as with 7 and 17) offers safety in Numbers because it is divisible only by itself and 1.
不过13(以及7和17)是安全的数字,因为它只能被它本身和1整除。