thin stratum

• 薄层

thin stratum的用法和样例：

例句

1. A single seed is enclosed by a thin pericarp.
   一个单独籽粒，外面裹有一薄层果皮。
2. Thin layers of sandy shale, and carbonaceous fragments are locally present.
   局部出现砂质页岩薄层和碳质碎屑。