A large regional key city refers to a key city which possesses transregional functions and significance.

大区域中心城市是指具有跨区域作用和意义的中心城市。

youdao

Guangzhou is a key city in China with excellent tourist resources, attracting visitors at home and abroad.

广州是国家中心城市，中国优秀旅游城市，也是国内外游客青睐的旅游胜地。

youdao

The research is the first time that scientists have shown that the size of the brain is a key part of city life for avians.

科学家们研究第一次表明，大脑的尺寸对鸟类来说是在城市生存的关键因素。

youdao

Key West is a very old city.

VOA: special.2010.03.22

A key stumbling block was Kirkuk. Ethnic Kurds would like to see the oil-rich city under the control of the Kurdistan Regional Government.

VOA: standard.2009.11.09

French and Malian forces retook a key city from militants Friday, a French source said.

CNN: January 19, 2013 -- Updated 0754 GMT (1554 HKT)

It put on its payroll the treasurer and campaign manager of a key city council member, Yvette Alexander.

FORBES: You Won't Believe The Stupidity Of The Latest Attack On Walmart

"Carlos' influence on literature goes far beyond borders of Latin America, and the impact of his intellect and activism will not be forgotten, " said Los Angeles Mayor Antonio Villaraigosa, who presented Fuentes with a key to the city in 2006.

CNN: Mexican author Carlos Fuentes dies