hardpan的翻译，读音

近义词

n. claypannadir point

例句

Soils with clay and hardpan can hold water and expand when they freeze and slide when wet . 土壤黏土、硬土层站得住脚并扩大他们在滑湿、冻结。

The limestone–and–clay and sand-and-clay soil over a hardpan and iron–dross subsoil allows excellent draining. 庄园粘土层上的石灰石泥和沙泥土以及心土钢渣形成了很好的排水。