黄土节理主要分为原生节理、构造节理、风化节理和卸荷节理。
Loess joints can be generally classified into primary joints, structural joints, weathering joints and unloading joints.
草本植被具有积极的保持水土的作用，在黄土高原生态环境建设中具有不可替代的作用。
Grassland vegetation plays active and important role in conserving soil and water, particularly in the eco-environment construction on Loess Plateau.
本文通过文献资料法、问卷调查法、实验法，对黄土高原生态环境下大学生定向运动课程的可行性进行了实验研究。
Through literature, questionnaire, experiment, this paper studied the feasibility of offering orienteering movement course under the ecological environment of the loess plateau.
采用科学史观简要分析了黄土高原生态环境演变的历史过程。
The process of eco-environment change was analyzed article with scientific view of history.
采用科学史观简要分析了黄土高原生态环境演变的历史过程。
The process of eco-environment change was analyzed article with scientific view of history.
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