水是维持生态系统良性循环的根本。
维持生态系统的完整是我们共同的利益。
We all have an interest in maintaining the integrity of the ecosystem.
为维持平衡,生态系统“顶点”的大鱼可能和小鱼一样重要。
To maintain a balance, big "apex" fish may be as important as the small one.
生态系统倾向以抗拒外来变化为原则而维持在一个平衡状态。
The tendency for a system by resisting change to remain in a state of equilibrium.
生态系统倾向以抗拒外来变化为原则而维持在一个平衡状态。
The tendency for a system by resisting change to remain in a state of equilibrium.
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