n [U] action of expanding; state of being expanded 扩大; 扩展; 膨胀
*the expansion of gases when heated 气体受热时的膨胀
* the expansion of his business interests 他的商业利益的增加
* the expansion of the school system 学校机构的扩大.
n [U and C]
when something increases in size, range, amount etc
→expandexpansion of The rapid expansion of cities can cause social and economic problems.expansion in an expansion in student numbers [U and C]
when a company, business etc becomes larger by opening new shops, factories etc
→expand The industry has just undergone a period of rapid expansion .[C]
an idea, story etc that is based on one that is simpler or more general The novel is an expansion of a short story he wrote about forty years ago.
1. Back in the good old days of stable economic expansion — the 1950s and 1960s — a person could choose to do something new, exciting, and creative in life but could also choose to say, "That's not for me: 回顾过去经济平稳发展的好时光--20世纪的50年代和60年代--人们可能会选择生活中某种既新鲜刺激，又有创意的事干，但是也可能会说：
2. The new emperor was quite interested in the expansion of territory. 新皇帝对领土的扩张非常感兴趣。
3. The hospital was facing an expensive expansion to the building because of a continual shortage of beds in intensive care. 由于重病特别护理区一直床位不足，所以医院面临着造价高昂的扩建问题，
4. In a way, China's backwardness is an advantage, because the expansion occurs just as new technologies are becoming cheaper than copper wire systems. 从某种意义上说，中国的落后成了一种有利因素，因为这一发展正好发生在新技术比铜线电缆系统更便宜的时候。