fog occurrence law 春季海雾
orebody occurrence law 矿体赋存规律
occurrence law of orebody 矿体赋存规律
law of occurrence 发生规律
The symptoms, pathogen, transmission routes and occurrence law of the cucumber downy mildew, bacterial angular leaf spot and brown spot were analyzed, and the corresponding fungicides which controlled different diseases were also put forward.
从发病症状、病原、传播途径和发生规律等方面对黄瓜霜霉病、细菌性角斑病和褐斑病3种病害进行了分析,并针对不同的病害提出了相应的防治药剂。
参考来源 - 黄瓜霜霉病\角斑病及褐斑病的识别与防治—《天津农业科学》—2010年第1期—龙源期刊网The occurrence law,causes and prediction of dust weather was discussed. The climate characteristics of dust days and weather situation in Chaoyang Region during 1953-2010 were analyzed,as well as the prediction vantage point.
对沙尘天气的发生规律、成因及预报进行了初步探讨,分析了19532010年朝阳地区沙尘日数的气候特征和沙尘暴日数偏多月份的环流形势,以及预报着眼点。
参考来源 - 朝阳地区沙尘天气发生规律及天气分析·2,447,543篇论文数据，部分数据来源于NoteExpress
Objective To investigate the occurrence law of acute hemorrhage of upper digestive tract.
目的探求急性上消化道出血发生的临床规律。
The lief cycle, life habits and host plant of CPB, as well as its harm and occurrence law in the potato planting areas were studied.
以马铃薯甲虫为供试材料，研究其在马铃薯种植区的生活史、生活习性、寄主、范围和田间消长规律等。
Article 1. This Law is enacted in order to prevent, control and eliminate the occurrence and epidemic of infectious diseases and to ensure the health of the people.
第一条为了预防、控制和消除传染病的发生与流行，保障人体健康，制定本法。
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