2) major natural hazards
主要自然灾害
1.
Taking 8 major natural hazards as objects of oppraisal,adopting proper indexes and index weight,we have calculated the synthetic values and assessed the major natural hazards in 87 counties and districts in Gansu province.
以甘肃省8种主要自然灾害为评价对象,合理选取评价指标,确定指标权重,计算自然灾害综合评价值,得到全省87个县(区)主要自然灾害危险性评价等级,并分析了全省主要自然灾害区域分异特征、主要灾害源地,为区域减灾防灾、区域发展规划提供理论依据。
3) distrbution and range of main hazards
主要灾害的分布和规模
5) major diseases
主要病害
1.
According to practice in recent years, the author provides personal idea on occurring rules of major diseases of cucumber in greenhouse in Pingyao and preventing strategies.
笔者根据近年实践,提出了平遥温室黄瓜主要病害的发生规律及防治策略的几点看法。
6) Main pests
主要虫害
1.
The paper outlined the development, preventing and controlling research of tobacco field main pests of all tobacco areas in China.
对中国各烟区烟田主要虫害的发生情况及防冶研究进行概述,旨在为防冶烟田主要害虫提供科学依据。
补充资料：主要
1.把握事物的关键。 2.指事物中关系最大，起决定作用的。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条