不可数名词的使用规则补充
a head of 一头
a head of lettuce 一头生菜
a head of cauliflower 一头花菜
a bunch of 一串
a bunch of bananas 一串香蕉
a bunch of grapes 一串葡萄
a bar of 一块
a bar of chocolate 一块巧克力
a bar of soap 一块肥皂
a packet of 一袋
a packet of flour 一袋面粉
a packet of paper 一袋纸
a box of 一盒
a box of juice 一盒果汁
a box of milk 一盒牛奶
a bottle of 一瓶
a bottle of oil 一瓶油
a bottle of water 一瓶水
