In the view of some problems existed in tree species and breedstructure and its management, some improving advice are put forward in this paper.
在树种和品种结构及管理上，都存在一些问题，本文对此进行阐述，提出了改进意见。
2
A new breed of designers, the information architects, built a discipline and practice to address the nonvisual design problems of logical structure and flow of content.