secondary center meaning in English

次级中心
二极中心局

The paper takes shiyan city as a study case . in light of the existing urban recreationally spatial structure and its landform , the paper puts forward “ ellipse circle ” formed by “ plot - axis ” , an ideal model of recreationally spatial structure for moderate cities , which can be described as : according to “ plot - axis ” model , a city which has unique central district firstly puts emphasize on the center and its axes , secondly transfers to secondary center and its axes , thirdly gradually shapes a recreational belt crossing the center of the city , finally forms “ ellipse circle ” model for recreationally spatial structure by recreational belt . finally , the paper comes up with corresponding countermeasures aiming at the recreationally special layout of each hierarchy in shiyan city
以十堰市为例,根据城市现有的游憩空间结构和地形特征提出了“点轴”拉动的“椭圆圈层”城市游憩空间结构模式,即对于只有一个中心区域的城市,根据“点轴”空间结构的发展模式,首先以中心区域为重点并发展其中心轴线,随后把重点逐步转到次重点区域并发展次中心轴线,照此循环下去逐渐形成横穿城市中心区域的游憩带,在游憩带的作用下形成了城市游憩空间的椭圆圈层模式;最后分别对城市社区、城区和环城三个游憩空间的布局提出了相应的改进措施。