干旱

Drought stress weakened the rhizosphere effect of ammonifying bacteria.Under drought stress,rhizospheric ammonifying bacterium amount of Baidan31 was very significantly different at seedling and jointing,and significantly different at tasseling-anthesis from that of control.Rhizospheric nitrifying bacteria tended to increase under drought stress.

干旱胁迫减弱了玉米氨化细菌的根际效应，与对照根际氨化细菌数量相比，白单31在苗期和拔节期根际氨化细菌数量受干旱胁迫的影响达极显著水平，在抽雄～开花期达显著水平；根际硝化细菌数量在干旱胁迫下有所增加。

Drought has seriously influenced agricultural development because there are 20310 million square miters area under cultivation in the west half arid and arid ecology area which is 51.5% of total cultivation area in JiLin province.

吉林省西部干旱、半干旱生态区现有耕地面积203.1万hm2，占全省耕地面和的51.5％，干旱严重地影响了农业的发展。

Propylaea japonica is one of important predatory natural enemies in arid and semi-arid area China, especially those preying on younger larvae and eggs of insect pest in orchards and cotton fields.

龟纹瓢虫Propylaeajaponica是我国干旱、半干旱地区农林果蔬生产中重要的捕食性天敌之一，尤其在夏季高温、干旱的情况下，对果园、棉田的幼龄害虫和卵的捕食作用非常明显。

Results indicated there were significant seasonal and spatial distribution characteristics. Drought occurred in high frequency at the stage of tasselling to silking and thereafter. Drought frequency obviously increased with backwards shift of growth stage. Light drought happened in higher frequency than medium and severe drought.

结果表明，湖南春玉米生长季节内干旱呈现明显的季节性和空间区域分布特征：干旱频率较高的时段主要在玉米抽雄－吐丝阶段及其后的生育阶段，且随生育期后移干旱频率明显增加，以轻旱程度为主。

Species in Ceratoides are semi-shrub xerophytes distributed in arid and semi-arid area. They have great potentialities to ecological restoration and high value to being used as forage. However researches on their physiological characteristics related to drought adaptabilities were not sufficient, yet.

驼绒藜属植物为干旱、半干旱地区具有重要生态价值和饲用价值的旱生半灌木资源，对该属植物适应干旱生理特性的研究尚不充分，加深研究有助于提高对它们的利用效率和应用价值。

In this experiment the seven tea varieties were dealt with the drought in the planting base of Tea Research Institute of Chongqing .The activity of SOD,POD and the quantity of ?OH were mensurated in the tea mature leaf, and the contrastive and dynamic analyse were carried .It is clear that the changers of activity of SOD,POD have a trend of first increase and following decrease in drought stress.

通过对重庆市茶叶研究所基地种植的7个茶叶品种干旱胁迫下叶片中的超氧化物歧化酶酶活性、过氧化物酶酶活性及体内羟自由基含量的对比试验和动态分析，表明SOD和POD在干旱胁迫下，均表现出&先升后降&的变化趋势，茶树体内羟自由基含量则随干旱胁迫的进程而增加。

Analysis of sedimentary facies and the multiple proxy indexes indicate that climate have many times dry-cold and warm-wet changes in the desert-loess transition belt since the last interglacial, and environment undergone alternations from warm semi-humid forest steppe, temperate-humid shrub steppe, semi-arid steppe and dry-cold steppe, desert steppe to desert.

地层沉积相及粒度、磁化率、化学元素、孢粉和古脊椎动物化石等气候代用指标的测试分析，揭示了研究区末次间冰期以来气候有过多次干冷、暖湿波动，曾经历了干冷的干旱荒漠、干旱荒漠草原、半干旱干草原、温湿灌丛草原或疏林草原、温暖半湿润森林草原气候环境的交替变化。

In ecological fragile zone in arid and semi-arid area of Inner Mongolia, the ecological forest net works were constructed by afforestation in drought sun slope of Daqingshan mountain ,along highway and of shelter belt in farm land.

在内蒙古干旱、半干旱区生态脆弱带，通过对内蒙古大青山干旱阳坡、绿色通道和山前冲积、洪积平原农田防护林等三个类型森林生态网络体系的构建，遵循适地适树的原则，选择适宜树种、营养杯或带土托大苗，采用了保水抗旱造林技术措施，使得干旱阳坡造林成活率达到了 85～ 95%；绿色通道林造林成活率为 80 -1 0 0 %；农田防护林造林成活率为 90～99.8%。

This highly drought-resistant spe-cies is adapted to arid and semi-arid conditions.

这个高度抵抗干旱的种类适应干旱和半干旱情况。

Reference crop evapotranspiration (ET0) and new wetness index were both calculated and analyzed according to Penman-Monteith scheme recommended by FAO with routine meteorological data from 616 weather stations in China from 1975 to 2004. In terms of grades of wetness index from Chinese Climate Classification Criterion, China is classified into severe arid, arid, semi-arid, semi-humid and humid zones, respectively, which are compared with the demarcations from rainfall-based indices in order to reveal the similarity and difference in association with the two schemes under current global climate warming. Besides, the spatio-temporal analysis of climate wetness over the country in the past thirty years was performed.

依据中国616个地面气象台站1975年至2004年的日气象资料，利用联合国粮农组织推荐的参考蒸散计算方法，计算参考作物蒸散（ET0）和湿润指数，按照中国气候区划中的干湿指标把中国分为极干旱、干旱、半干旱、半湿润和湿润气候区，并与传统的降水量干湿指标进行对比，揭示在全球气候变化下两种干湿指标的异同，最后对中国近30 a干湿状况进行时空分析。

On closer examination, though, this is not a vote for multilateralism but just the opposite.

仔细审视后我们发现，这并非是对多边主义投出的赞成票，而是恰好相反。

Uncovering their weak spots, so I can defeat them.

揭露出他们的弱点，这样我就可以打败他们了。