Forest ecologists have been more concerned than agronomists with the inner mechanisms of natural and artificial ecosystems . 森林生态学家比农学家更关心天然生态系统和人工生态系统的内部机制。
Accumulation of toxic substances in the biosphere is causing serious changes in the structure and function of natural ecosystems . 生物圈内有毒物质的积累，造成了天然生态系统的结构与功能的严重变化。
Figure 1 shows an example of an sca ecosystem 图1显示了sca生态系统的一个示例。
Is the most deadly snake in the entire ecosystem 在整个生态系统中是最致命的蛇
A case study on urban ecosystem health assessment 城镇生态系统健康评价实证研究
Whole chains of the ecology were being destroyed 整个生态系统链正在遭到破坏。
On the optimization of china ' s administrative ecosystem 优化我国行政生态系统浅论
I hope everyone can protect the ecosystem here 希望大家都能保护这里的生态系统。
Ecological systems are models for sustainability 生态系统是可持续发展的典范。
Is the most deadly snake in the entire ecosystem 在整个生态系统中是最致命的蛇
