Six and two threes字面上看，是“一个六和两个三”，其实做一做算术，就明白一个六不就是等于两个三嘛!所以说，Six and two threes也就是半斤八两，彼此不相上下的意思。(古代一市斤等于十六两，所以半斤等于八两)

【例句】
It's six and two threes to me . They were both at fault.
对我来说，这是半斤八两。他们两人都有错。

We can play basketball or badminton，it’s six and two threes to me.
我们可以打篮球或羽毛球，对我来说都一样。