Northwest China is very short of water resources and its ecological environment is very brittle.
西北地区水资源短缺，生态环境相当脆弱。
Valley ecological environment safety is the key to the guarantee of water resources.
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保证水资源的关键。
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