top soil

常見(jiàn)例句

If the topsoil is taken away by erosion, plants can no longer grow in the soil left behind.
如果因水土流失而沖掉了表土，植物不能再在留下的土壤中生長(zhǎng)。
The runoff sediment has higher clay content than the surface soil, andthe splash soil has higher fine sand content.
通過(guò)對(duì)侵蝕上壤的顆粒組成分析表明，侵蝕對(duì)土壤顆粒具有選擇性，徑流侵蝕泥沙中粘粒含量比侵蝕表土含量高，濺蝕泥沙中細(xì)沙粒含量變高。