二是用科学技术解决生态环境问题时遇到的理性难题；
Second, we fall across rational problems when we solve entironment problems by the technology.
河流健康的概念既强调了保护河流生态系统的重要性，也承认人们适度开发水资源的合理性。
The concept of healthy rivers lays emphasis on the importance of protection of river ecosystem and also accepts the rationality of appropriate development of water resources.
人类在改造自然的过程中，由于认识上的误区和行动上的不合理性，导致了生态危机的产生。
In the course of transforming nature, ecological crisis has resulted from human being 's mistaken ideas and irrational action.
后现代主义语境下的原生态民间音乐，由于具有了独特的音乐文化价值及审美价值，因而有其存在的必然性和合理性。
Original ecology folk music under postmodernism context has its inevitability and rationality because of its unique music cultural and aesthetic value.
利用生态学原理对灌木林的土壤物理性状、水文效益、抗旱性能进行分析研究，得出在干旱瘠薄山地灌木资源的扩大利用有广阔的前景。
The principles of ecology are used to analyse physical properties of soils in shrub forests, hydrolic benefits and drought resistances thereby to conclude…
同时，非理性的人类活动过多地占用了水资源，使得干旱区原本脆弱的生态环境日趋恶化。
At the same time, the excessive exploitation of water resources has caused severe deterioration of the eco-environment.
同时，非理性的人类活动过多地占用了水资源，使得干旱区原本脆弱的生态环境日趋恶化。
At the same time, the excessive exploitation of water resources has caused severe deterioration of the eco-environment.
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