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In accordance with the commonly accepted index of security evaluation on regional land ecology, a system of 22 indexes suitable for this region is established. 依据区域土地生态安全评价一般性指标体系,建立了适合该区的由22项指标组成的土地生态安全评价指标体系。
Based on clarifying of land ecological security and taking Hebei Province as the case, this article discusses the methods of security evaluations of land ecology. 以河北省为例,在界定土地生态安全概念的基础上,探讨了土地生态安全评价的方法。
The main causes for the deterioration of land ecological security are unreasonable reclaimation、 denudation, overgrazing and the extensive farming. 滥垦、滥伐、过度放牧以及粗放经营的生产方式是导致该地区土地生态环境安全状况不断下降的主要原因。
However,a series of land ecologically maladjusted problems have emerged because of the massive lop and unreasonable utilization of land in recent decades. 在分析该区脆弱山地生态基础上,探讨了土地环境的现状和演变。
This topic investigated the Hui'an County land ecological environment present situation, has appraised the land utilization type to the ecological environment influence. 本课题调查了惠安县土地生态环境的现状，评价了土地利用类型对生态环境的影响。
The concept of land ecological safety is the land ecosystem of mankind ensure degree unaffected by ecological destroy and environment pollution in the production, living and health. 土地生态安全是指土地生态系统对人类在生产、生活和健康等方面不受生态破坏与环境污染等影响的保障程度。
The land is laid down with red or white clover. 这块土地种上了红花和白花苜蓿。
The place used to be a stretch of barren land. 早先这里是一片不毛之地。
Swans are surprisingly awkward on land. 天鹅在陆地上笨得出奇。
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。
That remote barren land has blossomed into rich granaries. 过去的穷乡僻壤变成了富饶的谷仓。
The land flattens out near the coast. 海岸附近地势变得很平坦。
The blizzard blotted out the sky and the land. 暴风雪铺天盖地而来。
The storm blew fiercely over land and sea. 暴风雨猛烈地吹过陆地和海面。
How they long to get a sight of their native land! 他们多么渴望看一看故乡啊！
He came and staked out a claim to the land. 他来提出要求说那块地应归他占有。
He makes a grant of land to his son. 他将土地受让给他的儿子。
The land is destined for a new shopping center. 这块地已被划作为营建一个新购物中心之用。
The land is to be sold with plan permission. 这块地与建筑许可证一并出售。
The spy was dishonourably banished from, the land. 那个间谍被不光彩地驱逐出境。