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来源:雅诚德英语网
Mechanical engineers have worked with farmers and biologists to produce fertilizers, machinery and harvesting systems.
机械工程师与农民和生物学家合作开发肥料、机械和收割系统。
Mechanical engineers have worked with farmers and biologists to produce fertilizers, machinery and harvesting systems.
机械工程师与农民和生物学家合作开发肥料、机械和收割系统。