1. 膨胀，膨胀物
2. 扩张，扩展，扩大，扩建
3. 扩大物，扩张物，扩大部分
4. 张开，伸展，展开
5. 发展
6. 广袤，辽阔
7. 详述，阐述

1. [U]扩大,扩张,扩展,膨胀 action of expanding; state of being expanded
2. [C]扩张物,膨胀物 sth which has been expanded

1. the act of increasing (something) in size or volume or quantity or scope

2. a function expressed as a sum or product of terms;

   "the expansion of (a+b)^2 is a^2 + 2ab + b^2"
   

3. a discussion that provides additional information

4. adding information or detail

1.扩张;扩充;扩大;发展
expansion is the process of becoming greater in size, number, or amount.

expansion的反义词

e.g. ...the rapidexpansion of private health insurance.
个人健康保险的迅速发展
e.g. ...a new period of economicexpansion...
经济发展的新时期

1.

1. 扩充：20世纪60年代以来,发展中国家高等教育面临着扩充(expansion)、多样化(differentiation)和知识革命(knowledge revolution)这三大挑战. 这些挑战改变了高等教育及其存在的环境,对发展中国家产生了强有力的影响,

2.expansion：exp; 膨胀

3.expansion：expan; 合拢