耕作是有生产价值的劳动。
玉米、棉花、水稻、大豆和小麦的生产已在很大程度上实现了机械化，但许多高价值、劳动密集型的作物，如草莓，都需要劳动力。
Production of corn, cotton, rice, soybeans, and wheat has been largely mechanized, but many high-value, labor-intensive crops, such as strawberries, need labor.
玉米、棉花、水稻、大豆和小麦的生产已在很大程度上实现了机械化，但许多高价值、劳动密集型的作物，如草莓，都需要劳动力。
Production of corn, cotton, rice, soybeans, and wheat has been largely mechanized, but many high-value, labor-intensive crops, such as strawberries, need labor.
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