expansion
n.扩大；扩张；扩张物；膨胀物
网络解释.膨胀；扩张；扩展；扩大
词形变化:
复数：expansions
development width extension accession addition breadth growth
双语例句
1. 1 . This revolutionary expansion required energetic nation-building policies.
这种跨越式的扩张需要有活力的国家建设政策。
来自柯林斯例句