词：gulf    = gap

英英释义：a great difference and lack of understanding between two groups of people, especially in their beliefs, opinions, and way of life    

例句：The widening gulf between the rich and the poor is the source of many social ills in this country.     

《经济学人》一篇关于私人飞机的文章中也用到了 gulf：    

The blue jeans and t-shirts of the global elite are no more comfortable than those worn by the middle class. They drink the same coffee, watch the same films and carry the same smartphones. But a gulf yawns between the rich and the rest when they fly.     

yawn 打哈欠

The gulf looks unbridgeable. 

1）翻译下面的句子：        

一二线城市之间的贫富差距正在不断加大。

The wealth gulf between the first- and second-tier cities is continuously yawning wider.

造句：

他男友进入A校读博士生之后，她逐渐感受到他们俩之间慢慢出现的差距，最终使得她决定考研。

After her boyfriend came into A university to pursue a Ph.D degree, she began to feel aware of the growing gap between them, that led her decision to take an entrance exam for a postgraduate education.