what's the meaning of "two of a trade never agree"?anyone kowns?

what's the meaning of "two of a trade never agree"?anyone kowns?
what's the meaning of "two of a trade never agree"?
anyone kowns?

what's the meaning of "two of a trade never agree"?anyone kowns?
同行是冤家

是不是 老话里说的 买卖不一心啊 ？^^

同意“买卖不一心”的说法，
直译：“贸易的双方永远都不可能达成一致”

这是句英文谚语
意思是同行是冤家
two 指的2个人
trade 指的是贸易，行业
never agree 绝不可能达成一致