The research on agricultural intensification can go back to Karl Marx, long-standing and having different and distinct viewpoints.
关于农业集约化的研究始自马克思，由来已久，观点各异。
The research on agricultural intensification can go back to Karl Marx, long-standing and having different and distinct viewpoints.
关于农业集约化的研究始自马克思，由来已久，观点各异。
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