买卖用英语怎么说

买卖在英语中可以表达为 "buy and sell" 或 "trade". 来源方面，"buy and sell" 是由两个独立的英语动词 "buy" 和 "sell" 组合而成，而 "trade" 则源于古英语中的 "trædan"，意思是 "交换" 或 "交易". 下面是一些例句：

I bought this watch from a street vendor. (我从街边小贩那里买来这块手表。)
She sells books on the internet. (她在网上卖书。)
I traded my old phone for a new one. (我用旧手机换了一部新手机。)
He makes a living by buying and selling antiques. (他靠买卖古货为生。)