Seasonal fluctuation in incidence of this disease was observed, being higher in the spring and summer and lower in the autumn and winter.
发病的年度波动不明显，但有季节性波动，即春夏高于秋冬季。
The distribution, breeding habits and seasonal fluctuation of the various mosquito larvae were studied at eight breeding places in the Mountain Resort from 1985 to 1995.
1985年和1995年先后在承德避暑山庄内选择8个具有代表性的蚊幼虫孳生地进行了蚊种类的分布及季节消长的研究。
As the result of seasonal fluctuation of water, the total Hg concentration of water and sediment would be degressive in sequence of low water, flush time and ordinary level.
水位随季节周期性消落，将导致水体相和沉积物相中的总汞浓度按枯、丰、平顺序依次递减。
Conclusion The clarified fly species composition and seasonal fluctuation at Xiuyu Port provide scientific references for fly controlling and infectious diseases monitoring.
结论基本摸清秀屿港口岸蝇类种群组成及季节消长，对实施蝇类生物控制和开展传染病监测等工作提供了科学依据。
Stock market seasonal fluctuation is a part of short time fluctuation theory in stock investment return. This kind of phenomenon exists in the stock market of a lot of countries.
股票市场季节性波动是股票投资收益的短期波动理论，这种现象在许多国家的股票市场中存在。
Using standard X -11 method, we analyze seasonal fluctuation of international oil price and discuss its movement discipline, in order to provide information support for importing oil of our country.
利用标准x - 11方法分析国际油价季节性波动，探讨油价运动规律，为我国进口石油提供信息支持。
The results show that annual changes and seasonal distribution of precipitation led to the fluctuation of the primary productivity of the community;
结果表明：降水量的年度变化及其季节分配直接导致了克氏针茅草原群落初级生产力的年度波动；
Overall, in 2007, there was an obvious seasonal change in the spatiotemporal distribution patterns of Chilean jack mackerel fishing grounds, and the CPUE value had a larger fluctuation range.
初夏渔场有所南撤。总的来说，智利竹筴鱼渔场时空分布具有明显的季节变化，CPUE值波动范围较大。
Soil nutrition content is little fluctuation with seasonal changes.
养分含量的季节性变化幅度较小。
Methods The night trapping method was used to systemically monitor the species composition and seasonal density fluctuation of rodents at Daxie port from Jan. 2006 to Dec. 2010.
方法从2006—2010年，采用夹夜法对大榭口岸的鼠类种群的构成、密度、季节消长情况进行了调查。
Methods The night trapping method was used to systemically monitor the species composition and seasonal density fluctuation of rodents at Daxie port from Jan. 2006 to Dec. 2010.
方法从2006—2010年，采用夹夜法对大榭口岸的鼠类种群的构成、密度、季节消长情况进行了调查。
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