Others claim that in order to ensure the balance of ecosystem, human beings have the obligation to preserve endangered animals.

另外一部分人则认为，为了保证生态环境的平衡，人类有义务保护濒危动物。

youdao

Grasping basic concepts, functions, ecological balance of ecosystem and knowing about the application of ecology in environment.

掌握生态系统的基本概念、功能、生态平衡，熟悉生态学在环境保护中的应用。

youdao

The expansion of cities, towns and roads were the main causes of the values' decrease. Despite this aspect, the land-use policies are positive in protection and maintain the balance of ecosystem.

土地利用政策评价在保护、维持生态系统服务功能价值方面起到了积极的作用。

youdao

Some ecologists suspect that the explosion of the lobster population in Maine may be due not only to the regulations, but also to the fact that the Gulf of Maine represents an ecosystem out of balance.

ECONOMIST: Lobsters in Maine