the occurrence regularity 发生规律
coal occurrence regularity 赋煤规律
gas occurrence regularity 瓦斯赋存规律
occurrence regularity of orebody 矿体赋存规律
occurrence regularity of ground water 地下水赋存规律
base of regularity of occurrence 以成本发生之经常与否为基础
Through systemically survey its occurrence regularity was studied, quantity of B. tabaci on different cotton varieties was investigated and compared, and the control of B. tabaci was also investigated. The results were as follows:1.
通过大田系统调查,对敦煌市棉田烟粉虱的发生规律进行了研究,并对不同棉花品种上烟粉虱的发生数量进行了比较,同时对烟粉虱的防治进行了初步研究。
参考来源 - 敦煌市棉田烟粉虱的发生规律及防治研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The occurrence regularity of scab disease on hot pepper and its control techniques were investigated and studied in Dafang county.
对大方县辣椒疮痂病田间发生规律进行了调查及综合防治技术研究。
This paper reviewed the classification status, occurrence regularity, damage symptom of vegetable rot-knot disease and analyzed the control measures.
对蔬菜根结线虫的分类学地位、发生规律、为害症状进行了总结归纳，对多种防治措施进行了分析。
The article has introduced the gas geologic features in B4 Coal Seam in Fengcheng Colliery and analyzed the correlation factors of gas occurrence regularity.
本文简要叙述了丰城矿区B4煤层瓦斯地质特征，分析了瓦斯赋存规律相关因素。
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