ochrea

例句：

1. 1. The ancient city of Pompeii was buried under layers of ochrea.
   庞贝古城被赭石层所埋。
2. 2.The artist used ochrea to create a vibrant landscape painting.
   这位艺术家用赭石创作了一幅生动的风景画。
3. 3. The ochrea in the museum is said to have been mined from the nearby volcano.
   博物馆里的赭石据说是从附近的火山开采的。