关于buy的短语：
1、buy sth for sba bad buy吃亏的买卖
2、a best buy 上算的买卖
3、a good buy 便宜货
4、bought and sold 被出卖
5、buy out 收买
6、buy sth for sb 给某人买某物
7、buy sth for some money 用多少钱买某物
8、buy off 收买
