沙尘天气主要发生在春季和冬季。
近年来，北京频繁发生沙尘天气。
大气环流是制约沙尘天气的直接原因。
The direct reasons that control dust storm weather are atmospheric circulations.
本文阐述了北京沙尘天气的总体概况。
The Dusty weather in Beijing is discussed as a whole in this paper.
沙尘天气的发生具有明显的季节变化特征；
The characteristics of dust' s seasonal variation are significant.
中午时天空放晴，但未来会有更多的沙尘天气。
Skies cleared by midday, but a warning of more dusty weather remained in place.
对防治沙尘天气污染大气环境提出了应对措施。
The countermeasure to prevent and control sand and dirt storm was suggested.
各种沙尘天气发生时，均以亲地元素的浓度为最高。
The crust elements had the highest concentration when all kinds of sand weather happened.
罗格就昨天沙尘天气再次强调不会对运动员有危害。
IOC President Jacques Rogge rushed to reassure athletes yesterday that they would not be put in danger.
风要素是影响沙尘天气最为直接、最优相关的因子。
The wind is the most direct and the most optimal-related factor for dust weather.
近年城市中不仅常常出现沙尘天气，还有局部沙尘频繁出现。
In recent years, not only the sand and dust weather often appears, but also partial sand and dust occurs in city.
亲地壳元素中的主成分元素在有沙尘天气时，其富集因子也偏高。
The enrichment factor of mainly absorbent element is also high under dust and sand weather conditions.
结论西安地区发生的沙尘天气，与地表黄土组成有着密切的关系。
ConclusionDuststorm and sandstorm occurred in Xi 'an City has close relationship with its surface layer loess.
这主要与沙尘天气的发生、大气层结稳定度和人类活动等因素有关。
This is mainly associated with dust weather, turbulence of boundary layer and human activities.
本文还探讨了大气气溶胶光学厚度与水平能见度以及沙尘天气之间的关系。
The relationships between atmospheric aerosol optical thickness and horizontal visibility as well as the dusty weather were discussed.
2000年春季北京频频发生沙尘天气，严重影响了北京市大气环境状况。
In spring 2000. dust storm weather occurred frequently in Beijing, which result in bad effect on atmospheric environment.
2000年春季北京频频发生沙尘天气，严重影响了北京市大气环境状况。
In the spring of 2000, dust storm weather occurred frequently in Beijing, which resulted in bad effect on atmospheric environment.
选择兰州市典型沙尘和非沙尘天气收集两类降尘，并对其元素组成进行测定。
The dustfall samples collected under typical dust and non-dust weather were analyzed to examine their composition in Lanzhou.
选择兰州市典型沙尘天气和非沙尘天气收集两类降尘，并对其进行粒度测定。
The dustfall samples collected under typical dust and non-dust weather were made particle size analysis in Lanzhou.
他说，经过严冬之后气温的升高使土壤逐渐解冻，这是引起近期频繁沙尘天气的主要原因。
Rising temperature that unfroze the soil after a severe winter was blamed for the frequent sandstorms this year, he said.
降水、蒸发、日照和沙尘天气只有个别月份通过了显著性检验，相关性不明显。
The precipitation, evaporation, sunshine, dust and sand weather only passed significance inspection in the specific month, and the dependence is not obvious.
沙尘天气分沙尘暴、扬沙、浮尘三种，北京扬沙天气的沙尘源以就地起沙为主。
The sources of sand-dust during sand blowing weather mainly come from Beijing outskirts.
沙尘天气在伊拉克非常常见，扬起的沙尘往往会侵入其邻国，如沙特阿拉伯和伊朗。
Dust storms are common in Iraq, and frequently spread to neighboring countries, including Saudi Arabia and Iran.
为了深入了解沙尘天气的发生规律，有必要对历史时期的沙尘天气状况进行研究。
It is necessary to investigate the dust weather in the past period in order to deeply understand the law of its emergence.
北方女孩很喜欢打扮自己，但是频繁的沙尘天气和干燥的气候经常使女孩们一筹莫展。
Girls in China's north enjoy dressing up, but frequent sandstorms and dry environment often make them frown.
利用青岛市7个站1961—2004年的气象资料，分析了青岛沙尘天气的时空分布特征。
Based on meteorological data of 7 stations in Qingdao during 1961-2004, the space-time distribution characteristic of sand-dust weather in Qingdao is analyzed.
分析认为，自然因子的周期变化是造成沙尘天气分布和变化的主要原因，人为因素起了加强作用。
According to this article, the cyclical change of the natural factors is the main factor to the Sand-Dust weather, while artificial factors make strengthen action.
分析认为，自然因子的周期变化是造成沙尘天气分布和变化的主要原因，人为因素起了加强作用。
According to this article, the cyclical change of the natural factors is the main factor to the Sand-Dust weather, while artificial factors make strengthen action.
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