基本解释砾质粘土英汉例句双语例句In this paper, the effect of water scouring to the filter about clay and gravelly soil is analyzed by using the crack scour tests.本文结合湖南隆回渗滤取水工程，采用调查、试验、分析、研究等方法，对滤层淤塞的影响因素、反冲洗改善天然滤层渗透性的试验进行研究。gravelly clay更多例句词组短语短语clay gravelly soil 粘粒土gravelly clay更多词组