Alongside with the evolution of agricultural, industrial and knowledge economy, the nature and extension of labor are changing, scientific, management and service laboring all create values.
随着农业社会、工业社会和知识社会的演进，劳动的内涵和外延都有变化，科技劳动、管理劳动和服务劳动都创造价值。
On the basis of the investigation and experimental researches, the authors made their Suggestions on the comprehensive management of the loess plateau and development of agricultural economy there.
本文以调查材料与科研成果为依据，阐述了对黄土高原地区开展水土保持综合治理与经济开发的意见。
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