... ion forest 防护林; 保安林 protective ozone shield 臭氧防护屏; 保护性臭氧屏蔽 Protocol concerning Land-based Sources of Pollution 关于陆源污染的议定书 ...
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forest conce ion 森林特许权
The paper describes the cost compost ion and accounting system for forest fire suppression.
本文描述了森林火灾扑救成本构成与核算体系。
To study the variation of aero-anion concentration in forest recreational areas, the concentrations of aero-ion were measured under different vegetation types in Guilin National forest Park.
在桂林国家森林公园选择不同的植被群落类型进行空气离子浓度监测，研究森林游憩区空气负离子浓度水平变化。
Kuanyin Mountain Forest Park all year round fresh air, fine spring high negative ion content.
观音山森林公园一年四季空气清新，鸟语花香，负离子含量极高。
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