So urban system research is different from other urbanscience such as urban planning science in study field of vision.
因此，城市体系研究在研究视角上与其它城市科学，比如城市规划学有明显的不同。
2
Today, the research on fringe area of big cities' which began in early 1970's have become one of major subjects in the urbanscience.
有关大城市边缘区的研究，在国外开始于70年代早期，目前已成为国外城市学界研究的主要课题之一。
3
The scale of urban population has become one of the most important research fields in urbanscience because of its mutability and the importance of determining it.