耕作是有生产价值的劳动。
价值的实体是劳动，是人类劳动力的生产耗费。
The substance of value is the expense of human productive labor.
主张拓宽马克思劳动价值论的生产劳动内容。
Stand for developing the production and labor contents of Marx's labor theory of value.
主张拓宽马克思劳动价值论的生产劳动内容。
Stand for developing the production and labor contents of Marx's labor theory of value.
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