It has no mains water or drainage.没有自来水和排水系统。

Good drainage is important.良好的排水性很重要。

Good drainage doesn't mean dry soil.良好的排水性并不意味着土壤干燥。

Line the pots with pebbles to ensure good drainage.在罐子里铺一层鹅卵石, 以保证排水性能良好。

The drainage system has collapsed because of too much rain.因为雨量过大, 排水系统崩溃了。