expansion

公司的快速扩张让每个人都感到惊讶。

The rapid ___expansion of the company surprised everyone.

宇宙的膨胀是宇宙学中的一个关键概念。

The ___expansion of the universe is a key concept in cosmology.

软件行业的快速扩张创造了许多就业机会。

The rapid ___expansion of the software industry created many jobs.