买: buy
卖: sell
比如:I want to go to the supermarket to buy some fruits.我想去超市去买些水果。
He sells his car at the price of 20,000USD.他以2万美金的价格出售他的车。
参考资料:http://fanyi.baidu.com/#en/zh/buy
http://fanyi.baidu.com/#en/zh/sell
买的英语拼写:buy
卖的英语拼写:sell