| 1. | Agroecosystems are often highly productive .
农业生态系统通常具有很高的生产力。 |
| 2. | 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。 |
| 3. | The ultimate source of energy of all ecosystems is the sun .
太阳是一切生态系统能量的基本来源。 |
| 4. | 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。 |
| 5. | The ecosystem can be redefined as interlocking life systems .
生态系统可以再定义为相互关联的生命系统的综合。 |
| 6. | Another fundamental concept in ecology is that energy flow through the ecosystem .
生态学的另一个基本概念乃是生态系统中的能流。 |
| 7. | Temperate forest ecosystems occupy a position of prominence among all ecosystems .
温带森林生态系统在所有生态系统中占有优势地位。 |
| 8. | In some climax communities, there is slow accumulation of net ecosystem production .
某些顶极群落中也存在缓慢积累的净生态系统生产。 |
| 9. | Each ecosystem, however, is continuous to some degree with adjacent systems .
然而，每个生态系统在某种程度上都和邻近的系统是连续的。 |
| 10. | All these patterns of agriculture operate within the context of the global ecosystem .
所有这些农业类型，都在全球生态系统的范围内产生作用。 |
