1. 当短语“a pair of + 可数名词复数”被形容词所修饰时,形容词应该置于pair之前.例如:
I need a new pair of trousers. 我需要(买)一条新裤.
I need a new pair of shorts. 我需要(买)一条新短裤.
2. 当短语“a piece of + 不可数名词 / 抽象名词”被形容词所修饰时,形容词应该置于piece之前.例如:
a small piece of paper [china] 一小块纸片[瓷片]
a thin piece of rope 一段细绳
I think this is a fine piece of work. 我认为这是一件好作品.
There is an important [a glad、a good] piece of news in today’s Chongqing Daily. 今天的重庆日报上有一条重要[好]消息.
3. “a variety of+ 可数名词复数”也是这样.