1) I want to buy a bra.
我要买一个乳罩。
2) I want to buy this one.
我要买这一个。
3) I want a lighter.
我要买个打火机
4) I want to buy several basketballs.
我要买几个篮球。
5) I need a half pound of cheese.
我要买半磅乳酪。
6) I'll buy you another one.
我再买一个给你。
参考词条