| 1. | These animals have contributed to an ecological balance which has sustained man through hundreds of millennia .
这些动物提供的生态平衡，支持了人类生存的数十万年。 |
| 2. | Throughout most of the 2 million years of human existence on earth, humanity's numbers have been few .
人类生存在地球上已有200万年的历史了，其中大部分时间地球上的人的数量少得可怜。 |
| 3. | When levels of income are very low, the most elementary aspirations for human existence and improvement are frustrated .
当收入的水平很低时，人类生存和进步的最基本愿望，便受到挫败。 |
| 4. | - the human condition . - oh . you know about it
-人类生存条件-哦，你对那个很了解 |
| 5. | The human condition . - oh . you know about it
人类生存条件-哦，你对那个很了解 |
| 6. | Energy - the kind of magic we can ' t live without
能，是与人类生存息息相关的一种魔力。 |
| 7. | Computer network and the tension of human existence
网络与人类生存的张力 |
| 8. | Human nature is really a reflection of the human condition
人性是人类生存条件的真实反映 |
| 9. | On man ' s living space under high - technology
略论高技术下的人类生存空间 |
| 10. | Ecosystem is prerequisite for mankind
生态系统是人类生存的基础。 |
