这个地区有良好的天然排水系统。

The area has good natural drainage.

《牛津词典》

可 用来输送液体介质或气体介质，尤其适用于石油、天然气的输送和城镇的给排水系统中。

The tube can be used for liquid or gas media conveyance and is especially suitable for oil and natural gas transportation and urban water supply and drainage system.

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