都市区是由一个或多个中心城市和与其有紧密社会、经济联系的相临城镇组成，具有一体化倾向的协调发展区域。
Metropolis area is a region that consisted by one or more central cities and adjacent towns which have close social and economic connections with the central . It is also a coordinated development area with integration trend .
临城镇