a length of cloth 一段布

an expanse of water 一片水

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

a gallon of petrol 一加仑汽油

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 basket of fruit 一篮水果

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

a spoon of medicine 一汤勺的药