流域生态环境安全是保证水资源的关键。
Valley ecological environment safety is the key to the guarantee of water resources.
流域生态环境安全是确保水资源的关键。
Ecological and environmental safety is the key to ensuring water.
当今社会正面临日趋严重且类型众多的灾害，构成生态环境安全的巨大威胁。
The modern society is facing more serious and more popular natural disasters. These disasters have become threats to the safety of ecological environment.
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