干旱地区

In Asia, the significant environment changes in Cenozoic include: uplift of Himalayas and Tibetan P...

在亚洲地区，新生代重大的古环境变化包括青藏高原的隆起、亚洲季风出现、中亚地区干旱化等。

The results show: the most sensitive Chinese area to acid deposition is Podzolic soil area, then follow Latosol, Dark brown forest soil and Black soil areas; Ferraisol and Yellow-brown earth area in southern China can buffer about 0.8-1. 6 g Sm〓yr〓 sulfur deposition; the least sensitive areas to acid deposition are mainly Xerosol area in northwest China, Alpine soil area in the Qingzang Plateau, and Dark loessial soil and Chernozem areas; the main reason for lower critical load in northeastern areas and higher critical load in Ferralsol and Yellow-brown earth areas in China can be attributed to the obvious difference in temperature, humidity and soil properties.

研究表明：我国土壤对酸沉降最敏感的区域是漂灰土带，其次是砖红壤土区、暗棕壤带和黑土区，南部富铝土区域大致可接受O.8-1.6 g Sm〓yr〓的硫沉降，对酸沉降最不敏感的区域主要集中在西北干旱土和青藏高原的高山土区域以及黑垆土和黑钙土带；导致我国东北地区酸沉降临界负荷偏低和富铝土区域酸沉降临界负荷偏高的重要原因，是这些地区的气温、湿度和土壤质地存在显著差异。

Based on palynological data,we suggest that the retreat of the Tethys and Parat ethys from southern and Central Asia in Eocene and the uplift of Qinghai-Xizang Plateau in Miocene have largely shielded the monsoon climate northwestward,and have resulted in the Tertiary aridification in NW China.

文章依据孢粉资料讨论我国西北地区第三纪时期植被的演变情况，认为始新世时古地中海和副古地中海自南亚及中亚地区的撤退，以及中新世时青藏高原的隆起对东亚季风的屏蔽，都对西北地区的干旱化起了重大作用。

Different climate change in west and east part of north China in recent years is major reason for this phenomenon, not vegetation cover, but degenerated vegetation cover, corresponding to abnormal droughty climate during these period, is one of reasons for abnormally high dust activity in the end of 9Os'in Huabei Plain.

九十年代末，对应于我国北方地区，特别是华北地区干旱少雨的气候条件，植被覆盖状况有明显下降的趋势，这可能是世纪末华北地区沙尘活动频繁的一个重要原因，但我国西部沙尘源区沙尘气溶胶光学厚度仍然保持继续下降的趋势。

Maize plants were treated by the low temperature under different water conditions during seedling and tasseling periods in the artificial climate chamber to determine the impacts of low temperature, drought and their combination on maize yield in the Northeast China. Based on the results of the controlled experiment, the WOFOST model was applied to simulate the integrated impacts of low temperature and drought on maize yield.

在玉米苗期和抽雄期利用人工气候箱对不同水分条件下的玉米植株分别进行低温处理，通过控制试验分析了低温、干旱以及二者合并对玉米生产的影响，在此基础上应用WOFOST作物模型模拟分析了低温、干旱以及二者合并对东北地区玉米产量的影响。

Starting from the correlation between precipitation and crop water requirement in Chaoyang County,the profit and loss of natural precipitation and the drought situations in Chaoyang Area were discussed by using the balance formula of crop water requirement and drought index method.

从朝阳县降水量与作物需水量之间的关系出发，应用作物水量平衡公式和干旱指数法，探讨朝阳地区自然降水的盈亏与干旱情况。

Brazil ranks among the world's highest in economic inequality, and the southeast's luxurious living standards often come under fire by impoverished regions such as the drought-stricken northeast.

巴西是世界最高的经济不平均，和东南地区的豪华生活水平经常受到火灾的贫困地区，如干旱受灾的东北地区。

Brazil ranks among the world's highest in economic inequality, and the southeast's luxurious living standards often come under fire by impoverished regions such as the drought-stricken northeast.

巴西是世界最高的经济不平均，和东南地区的豪华生活水平经常受到火灾的贫困地区，如干旱受灾的东北地区。谢谢您的阅读，您是本文第233860个阅览者关闭窗口

D 1890-2000,the drought disaster rank,the time variation,spacial variation and the arid change tendency fitting were studied in this paper.

通过对历史文献资料的收集、统计和分析，对1800-2000年关中地区干旱灾害的等级序列、时间变化、空间变化和干旱变化趋势拟合进行了研究。

For example,a drought in the 1930s caused farmers to abandon their farms across the U.S.Midwest.The absence of crops intensified local soil erosion,leading to powerful dust storms.Large amounts of wind-swept dust traveled across the continent,caousing the infamous Dust Bowl and affecting air qualit,public health and patterms of human settlement throuhout the country.

比如，20世纪30年代的干旱迫使美国中西部地区的农民背井离乡；农作物的缺少加剧了当地突然的侵蚀，继而引发了严重的沙尘暴；大量风沙席卷整个美国大陆，形成了臭名昭著的干旱尘暴区，并对全国范围内的空气质量，公共健康以及人类的居住方式造成了负面影响。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐