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。
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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。
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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(dú)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