The first expansion, the Song Dynasty Tri-Cities into one, saying that the Old City, circumference of 10.5 kilometers.

第一次扩建时，把宋代三城合而为一，称老城，周长10.5公里。

youdao

The Tri-Cities area has one of the lowest unemployment rates in Washington State, and the housing market has barely been affected by the recent economic downturn, according to the Tri-Cities Industrial Development council.

CNN: Federal funds aim to clean up nuclear wasteland

Business publications include the Tri-Cities on their lists of the best places to live and work.

ECONOMIST: Trouble stalks America��s biggest clean-up

Fuller is a new teacher at Tri-Cities High School in East Point, Georgia.

CNN: Unlikely teachers find purpose in the classroom