topsoil

Stone is the foundation, above which is soil, and then topsoil.

石头是基础，上面是泥土，再上面是表土。

After shoveling out the topsoil, Garfinkel uncovered coins and other artifacts from the time of Alexander the Great.

在铲去了表层土以后，加芬克尔发现了来自亚历山大大帝时期的硬币和其他人工制品。