people invented farming tools
[3] People invented farming tools, designed elaborate irrigation networks, and built the first cities.
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people invented farming tools
人们发明了农具
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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People invented farming tools, designed elaborate irrigation networks, and built the first cities.
人们发明了农具，精心设计的灌溉网络，建成了第一个城市。
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