Objective to study the impact of the sand dust storm on the incidence rate of respiratory diseases.
目的探讨沙尘暴对呼吸系统疾病影响的特点和规律。
Meteorological records in the past 50 years indicate that there has been a sharp decrease in sand dust storm frequency, which is in accordance with the decrease in annual mean wind speed.
近50年来多个站点的观测记录表明了沙尘暴的发生频率处于快速下降的过程，这恰好与年均风速的变化趋势较为一致。
The comparison between the analysis results of the loess samples and the dust aerosol samples shows that this experiment method is very good to do dust source and sand dust storm researches.
黄土样品的分析结果与粉尘气溶胶样品的离子分析结果对比表明，此方法对于探讨粉尘起源以及沙尘暴天气的研究具有重要意义。
Appear when sandstorm in the sand, floating dust storm wrapped by district, who was filled QiangBi fan, air turbid eyes, respiratory diseases increased.
出现沙尘暴天气时狂风裹的沙石、浮尘到处弥漫，凡是经过地区空气浑浊，呛鼻迷眼，呼吸道等疾病人数增加。
Caption: Mali, 2001. Women caught in a sand storm. Dust storms cause soil loss - in particular the loss of the nutrient-rich lightest particles - reducing agricultural productivity.
描述：2001年，马里，一群妇女遭遇了沙尘暴。沙尘暴造成土壤流失，特别是富含养分的最轻微粒的流失，降低了农业生产力。
The phenomenon of wind erosion and desertification is widespread in mountain area of hebei province and it plays an important role in sand-dust storm in2000.
风蚀沙化现象在河北山区普遍存在，在2000年的沙尘暴中扮演了重要的角色。
The results show that upper trough and shear line and thermal depression are main synoptic systems introducing summer sand-dust storm.
研究发现高空小槽、切变线、热低压是引发夏季沙尘暴的主要天气系统。
The analysis indicates that the transporting force of sand-storm activity and matter in sand dust source area are the decisive factors of sand storm activity.
分析表明，沙尘暴活动的搬运动力和沙尘来源区物质所处状态是沙尘暴活动与否的决定因素。
And she said most of the days the weather is fine. Most dust actually comes due to sand storm from Gobi dessert not too far away up north west.
她说大部分时间天气很好，大部分的灰尘都来自西北的戈壁滩。
To improve the accuracy of sand-dust storm forecasting, an RBF-SVM method with automatic parameter selection was presented in this paper.
为提高沙尘暴的预报准确率，针对目前已出现的RBF - SVM沙尘暴预报模型中的参数优化进行研究。
The phenomenon of wind erosion and desertification is widespread in mountain area of Hebei province, and it plays an important role in sand-dust storm in 2000.
风蚀沙化现象在河北山区普遍存在，在2000年的沙尘暴中扮演了重要的角色。
The special topography, climate conditions and the underlying surface with the source of the abundant sand were the material base of forming sand and dust storm.
特殊地形、气候条件和富含沙尘源的下垫面是形成沙尘暴的物质基础；
Because of natural and human factors, Heilongjiang province become one of the main area affected by sand-dust storm in northern regions of China.
由于自然及人为因素的作用，黑龙江省成为我国北方沙尘暴影响地区之一。
The effects of floating dusts of sand and dust storm to raw coal, coke and content of ashes is analyzed, and some emergency measures, future work methods and left questions in put forward.
分析沙尘暴的扬尘对生产中原煤和焦炭灰分含量的影响，提出应急措施和工作方法以及遗留问题。
The utility model relates to a dust storm sampler, which is used for collecting grains in dust storm whether, sand blowing whether and floating whether.
本实用新型涉及一种用于采集沙尘暴天气、扬沙天气、浮尘天气空气中颗粒物的沙尘暴采样器。
The origin of the sand and dust in the sand-dust storm forms the indispensable material condition.
沙尘暴尘源物质的形成及分布是形成沙尘暴必不可少的物质条件。
The probability of strong wind and sand-dust storm decreased.
大风和沙尘暴发生概率减少。
Many academicians regard that the cause of formation of sand-dust storm mainly is the vegetation in hungriness is destroyed.
关于沙尘暴的成因，学界大多认为其是近期以来 人为破坏荒漠植被的 结果。
Many academicians regard that the cause of formation of sand-dust storm mainly is the vegetation in hungriness is destroyed.
关于沙尘暴的成因，学界大多认为其是近期以来 人为破坏荒漠植被的 结果。
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