单词：ultra-clay
ultra-clay的用法和样例：
例句
- And the more the soil clay index is, the less the accumulation infiltration amount is.结果表明，浑水与清水入渗的差异主要是由浑水中物理性粘粒的存在引起的。
- With the process of the sandy desertification in grassland, the contents of clay decreased.随着草原沙漠化的加剧，土壤粘粒含量趋于减少，砂粒增多。
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