foundation soil

• 基土

foundation soil的用法和样例：

例句

1. Gravely soil with clay-limestone subsoil.
   以黏土与石灰岩为基土上覆厚实土壤层。
2. An equation that can breed other equations is the basic soil for this kind of life.
   一个可以繁衍其他方程的方程正是这种生命种类的基土。