新的商业开发主要集中在主要高速公路和购物中心周围。

New commercial development is ___concentrated ___around the major highways and shopping malls.

这个国家的人口集中在几个大型沿海城市。

The population of this country are ___concentrated ___in a few large coastal cities.

该大学的研究资源集中在与人工智能相关的项目上。

The university's research resources are ___concentrated ___on projects related to artificial intelligence.