1.
ITTO's Classification and Definition on Primary Forest,Degraded Primary Forest,Secondary Forest and Other Categories of Tropical Forests
ITTO对原始林、退化原始林、次生林和其他热带森林类别的界定
2.
(biology) degenerative reversion of cells or tissue to a less differentiated or more primitive form.
（生物学）细胞或组织的退形性变化；退回较原始的特性。
3.
Global Workshop on Addressing the Underlying Causes of Deforestation and forest Degradation
森林砍伐和退化的根本原因全球讲习班
4.
The Optimized Model for Conversion of Farmland to Forests in the Hill_Gully Subregion of Loess Plateau;
黄土高原沟壑区退耕还林优化模式研究
5.
Xilinguole Grassland Deterioration Status and Ecological Restoration and Rehabilitation Research
锡林郭勒草原退化现状及生态恢复研究
6.
Grassland Degradation of Different Factors on the Extent of the Impact Study of Xilin Gol
不同因素对锡林郭勒盟草原退化影响程度研究
7.
Research on the Causes of Forest Soil Degradation and the Prevention Countermeasures
我国森林土壤退化的原因及其防治对策研究
8.
A forest or wooded area in its natural state.
天然林，原始林天然状态的树林或林区
9.
AGING OF CLASSIC GARDEN IN CITY-CONCEPT MODEL AND CASE STUDY;
城市古典园林原始功能老化的初步研究
10.
The Study on Hydrochemistry Characteristic in the Process of Precipitation in the Primitive Korean Pine Forest
原始红松林降雨过程中水化学特征研究
11.
Strategies for Improving Ecology and Measures Against Desertification,Basification,Grassland Deterioration in the West of Jilin Province;
关于吉林省西部土地沙化、碱化、草原退化治理的对策
12.
Xiaoxing'an Mountains Virgin Forest & Secondary Forest Landscape and Digital Forest Management;
小兴安岭原始林与次生林景观及数字化经营研究
13.
primitive tropical gymnosperms abundant in the Mesozoic, now reduced to a few scattered tropical forms.
原始热带裸子植物，活跃于中生代，现在退化为一些分散的热带形式。
14.
a great fire swept across the bushland.
大火席卷了原始林带。
15.
Green trees reach to the sky in the virgin forest.
原始森林里碧树参天。
16.
the ferity of the animals of the virgin forest
凶残的原始森林动物
17.
The railway cuts through a primeval forest.
铁路穿越原始森林。
18.
Studying on Techniques of Main Pests Prevention and Contral in the Process of Returning Farml to Forest-In Guyuan Arei Optimizing Deployment Efects of Forost Maragement Forest;
固原市原州区退耕还林主要有害生物防治技术与营林优化配置效应研究