a gust of wind 一股风
a web of railroad 铁路网
a piece of information 一条消息
an article of clothes 一件衣物
a train of thoughts 一连串的想法
a nice cup of tea 一杯好茶
a thin coat of ice 一层薄冰
a stagnant pool of water 一潭死水
a beautiful stretch of field 一片美丽的原野
a pair of glasses 一副眼镜
a pair of scissors 一把剪刀
a pair of pliers一把钳子
a pair of trousers 一条裤子
a pair of shoes一双鞋
a pair of stairs一段楼梯
a cup of water 一杯水
a basket of vegetables 一篮子蔬菜
