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1. He is a plant engineer who designs and installs irrigation systems for farms.
他是一名植物工程师，负责为农场设计并安装灌溉系统。
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2. She is a plant engineer specializing in the development of new agricultural techniques.
她是一名专注于开发新农业技术的植物工程师。
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3. The plant engineer was responsible for ensuring that the crops were grown in an environmentally friendly manner.
这位植物工程师负责确保农作物以环保的方式种植。