Because of the specially scarcity of land resources, human always commit themselves to research on how to utilize and protect land rationally.
由于土地本身的特殊性和稀缺性决定，土地资源的合理利用与保护是人类永恒的研究课题。
Because of the specially scarcity of land resources, human always commit themselves to research on how to utilize and protect land rationally.
由于土地本身的特殊性和稀缺性决定，土地资源的合理利用与保护是人类永恒的研究课题。
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