hard soil

• 硬土

hard soil的用法和样例：

例句

1. They cut straight downwards through the hard, brush covered crust.
   他们穿透长着灌木的坚实的硬土一直向下掘。
2. Physical and biological science wilted and died on the stony soil of Roman prosperity.
   物理和生物科学是在罗马昌盛的硬土上枯萎而死的。