... exterior drainage 外流水系 external drainage 外排水,地面排水；外流水系，入海水系，通海水系 farm drainage 农田排水 ...
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The drainage systems of urbanized area include the municipal drainage systems that consist of rain pipes and the hydrological drainage system that developed from the farm drainage system.
城市化地区的排水系统不仅包括由市政雨水管网构成的市政排水系统，还包括原属农田排涝范畴的区域排涝系统。
The team went to work upgrading the farm’s buildings and drainage, and establishing an annual farm day for volunteers to perform other needed maintenance and upgrades.
这个团队开始升级农场的建筑和排水系统，并且设立年度的农场日以使志愿者完成其他的维护和升级。
Farm irrigation and drainage mechanical power and grain purchasing price index have negative correlation to grain production.
农业排灌机械动力和粮食收购价格指数与粮食生产呈负相关。
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