世界上重要的资源是人类自身和赖以生存的自然环境。
The most important resource is human being itself and natural environment relied in the world.
水资源是人类生存和生活必不可少的自然资源。
Water is essential to human survival and living as natural resources.
水资源是人类生存和生活必不可少的自然资源。
Water is essential to human survival and living as natural resources.
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