drainage material

基本解釋

For apricots, use a soil-less potting compost over plenty of drainage material.
對于杏的栽培，需要大量的排水材料和少量的土壤構(gòu)成的栽培條件。
blog.sina.com.cn
In general use a soil-based compost placed over a generous layer of drainage material such as earthenware crocks, pebbles or gravel.
通常在盆栽的底部鋪上豐富的排水材料，像陶器碎片、沙礫等，然后在上面鋪上土壤。
blog.sina.com.cn
The operational principles of UPVC spiral pipe and its specific characteristics in water passing capacity, drainage noise and material cost are introduced.
介紹UPVC螺旋管的工作原理，及其在通水能力、排水噪音、材料成本等方面的獨特之處，是今后住宅排水系統(tǒng)中的發(fā)展方向。

Lakes also act as a sink for water and material inputs from diverse sources from their surrounding drainage basins.
UNESCO: Summary