查询词典 arid region

Bryophyte ; ecology ; arid and semi-arid areas ; research review

苔藓植物；生态学研究；干旱和半干旱地区；综述

Zinc deficiency occurs worldwide in soils and plants, particularly in calcareous soils of arid and semi-arid regions.

土壤和植物中的锌缺乏是一个全球性的问题，特别是在干旱半干旱地区的石灰性土壤上。

Chapiter 2 discusses the theory of assets portfolios, which starts to analyze investor, arid deduces framed investor"s feasible set arid efficient set, discUss different forms and characteristic of efficient portfolio, and systematic analyzes the effect of portfolio, risk diversification, followed briefly summarizes the formation, development, application and limit of the "theory of portfolio, created by Markowitz.

本章从投资者开始分析，给出了框定投资者的可行集和有效集，并讨论了各种不同的有效组合类型及其性质，同时系统研究了资产组合的效应——风险分散，最后简要综述了马柯维茨投资组合理论的产生、发展、应用与局限。

Alectoris magna and Alectoris chukar are all the indicated birds of arid and semi-arid environment in northern China.

大石鸡和石鸡是我国北方干旱、半干旱荒漠环境的指示鸟类，前者是我国特有种，分布区狭窄，后者是广布种，亚种分化众多。

The common habitat of bryophytes is restricted to dankness, but some bryophytes, such as the species of Pottiaceae, Grimmiaceae, Bryaceae and so on, are able to survive in arid and semi-arid areas with strong ability of drought tolerance.

苔藓植物一般生活在阴湿的地方，但也有不少种类具有极强的耐旱性，在干旱和半干旱地区也有分布。

This method is suitable for calculating soil evapotranspiration in arid and send arid plain areas where the depth of water line is between 3 m to 10 m.

本方法适用于计算潜水埋深在3~10m的干旱半干旱的平原地区计算土壤水分腾发量。

Aibihu Lake is typical arid zone lake,it has arid zone ecosystem of especial everglade.

艾比湖是典型的干旱区湖泊，具有特殊湿地的干旱生态系统。

This case are same to light, moderate arid severe erosion type, which turn out to be a curve similar to Gaussian distribution, but soil erosion types at the two sides of the curve are totally different, in the left side of the curve, soil erosion are dominated by moderate and severe erosion type, arid in the right side of the curve, mainly soil erosion type is light erosion.

这种情况对于轻度、中度及强度土壤侵蚀的影响是类似的，都呈类正态分布的曲线形式，但在曲线的两侧土壤侵蚀类型是有本质区别的，在曲线的左侧土壤侵蚀类型的分布是中度和强度为主，而在曲线右侧则以轻度为主。

Due to the inclemency of climate and soil conditions and the intense disturbance of human beings,the soil resources heterogeneity in arid and semi arid grassland ecosystems worldwide was gradually increased during the last century.

世界许多干旱、半干旱地区草地生态系统逐渐被灌木生态系统取代，这种取代过程的发展是由灌木冠幅下土壤中"肥岛"的形成和灌木的扩散相互作用直接造成的。

Under the invariable air temperature and sunlight, the relatively high precipitation influences on vegetation mainly distribute in semi-arid and arid regions. The analysis on lag correlation coefficient indicates: vegetation activities are mostly influenced by precipitation and the influence has a delay of 20 days.

从华南经华东到华中地区，随着年积温的降低，绿度始期变化不大，绿度末期提前趋势明显，绿度期逐渐缩短；由华北、陕晋经内蒙至西北地区，因水分条件的变化，干旱指数逐渐增大，绿度始期逐渐推迟，绿度末期大致提前，植被绿度期逐渐缩短。

A carrier gas such as nitrogen is directed through line 20 and valve 22 to connect with line 26 and mix with the gas sample.

如氮气之类的载体通过管线20和阀22引入，与管线26相通，与气体样品混合。

But for the most part, knaves and parasites had the command of his fortune

然而支配他的家产的大多是恶棍和寄生虫。