a stretch of land 一片土地
a piece of work 一件工作
a carton of milk 一盒牛奶
a piece of luggage 一件行李
an ounce of gold 一盎司金子
a bar of chocolate 一大块巧克力
a cloud of dust 一阵尘土
a jet of water 一股水
a pile of earth 一堆土
a lock of hair 一绺头发
a pint of milk 一品脱牛奶
a liter of wine 一升红酒
a roll of paper 一卷纸
a portion of food 一份菜
a scrap of paper一片纸