| 1. | The world's natural ecosystems act as a buffer .
地球上的自然生态系统起着一种缓冲的作用。 |
| 2. | Natural and agricultural ecosystems form a continuum .
自然生态系统和农业生态系统构成一个连续的统一体。 |
| 3. | The species that make up natural ecosystems usually display a wide range of genetic variability .
构成自然生态系统的生物种，通常表现有较大范围的遗传变异性。 |
| 4. | The plants of natural ecosystems are usually well adapted to the edaphic and climatic character of their region .
自然生态系统的植物，通常十分适应当地的土壤和气候特点。 |
| 5. | Another difference is that parks are now expected to function like natural ecosystems as well as looking like them
另一个不同的地方，是现在的公园都像它们看上去那样，有自然生态系统的功能。 |
| 6. | The objects of their study are the degraded nature ecological system which done by natural calamities or people activities
其研究对象是那些在自然灾变和人类活动压力下受到破坏的自然生态系统。 |
| 7. | Circular economy demands restructuring economic system by the rule of material recycle and energy flow in natural ecological system
摘要循环经济倡导按照自然生态系统物质循环和能量流动规律来重构经济系统。 |
| 8. | Society was traditionally developed in the price of ecoenvironment destruction while natural ecosystem was sustainable developed
摘要人类传统的社会发展是以破坏生态环境为代价，而自然生态系统是可持续发展的。 |
| 9. | Main research conclusion is as follows : 1 the eco - fragile area is a district where natural ecosystem is out of balance over a long period of time
主要研究结论如下： 1生态脆弱区是指那些自然生态系统长期处于失衡状态的区域。 |
