| 1. | We too often fail to apply basic ecological principles .
我们都太不注意运用基本的生态学原则。
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| 2. | Forest entomologists have concentrated on ecological problems .
森林昆虫学家所重视的是生态问题。
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| 3. | The ecological setting acts as a stage for evolutionary processes .
生态的布景可作为进化过程的舞台。
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| 4. | Man's agricultural activities have become the dominant ecological force .
人类的农业活动已成为优势的生态力量。
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| 5. | So-called ecological countermeasures often work in specific situation .
所谓生态学的对策往往要在特殊环境下进行。
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| 6. | Species occupying the same ecological niches in the same areas usually do not cross .
在同一地区占有同样生态生境的两个种通常不杂交。
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| 7. | In nature, the rights of each species are cast in a broad ecological framework .
在自然界，所有物种的权利都熔铸于一个宽广的生态结构之中。
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| 8. | It was years before ranching and farming reached an ecological and political balance .
经过了许多年，牧业和农业之间才形成了生态与政治平衡。
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| 9. | Another useful ecological unit that cuts across this hierarchical classification is the life system .
另一个横贯这些等级分类有用的生态单元就是生命系统。
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| 10. | New systems must maximize the role of ecological mechanisms and emphasize the use of renewable resources .
新的系统应发挥生态机制的作用并重视可更新资源的利用。
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