1、I need a half pound of cheese
我要買半磅乳酪。

2、Will you give me a half pound of the ham and veal loaf while you have it out?
乘你拿出來(lái)了，順便給我拿半磅火腿，一塊小牛肉。

3、I need a half pound of cheese.
我要買半磅乳酪。