Land ecological model system is set up by using systematic idea, and multi-factors are analysed quantitatively.

应用系统论的观点建立了跋山库区土地生态系统模型，并对系统多因子进行了定量分析。

youdao

Using systematic view, the land ecological evaluation model of Heiquan reservoir area is set up, and many factors in system are analysed quantitatively.

应用系统论的观点建立了黑泉库区土地生态系统模型，并对系统多因子进行了定量分析。

youdao

Riparian zones are the important transitional regions for exchange of substance, energy, and information between river ecological system and land ecological system, and have obvious marginal effect.

河岸带是河流生态系统与陆地生态系统进行物质、能量、信息交换的一个重要过渡带，具有明显的边缘效应。

youdao

The spokesman said the land "currently has little ecological or landscape value".

BBC: Work carried out to protect Severn Estuary salt marshes

Ecological studies on the restoration of degraded forest land, the conservation of medicinal plants and their sustainable harvesting are being conducted at Achanakmar-Amarkantak.

UNESCO: EDUCATION

The producers argue that the engineered traits such as resistance to certain brands of herbicide or types of insects and virus actually do ecological good by reducing chemical use and improving yields so that less land needs to go under the plough.

ECONOMIST: Who��s afraid?