灰坑了有一堆烤土豆。

They left the ashes here.

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洛阳东周两汉时期的瓦当资料多来自于当时的建筑基址、烧窑、灰坑和墓葬中。

Chinese eaves tile materials of the Eastern Zhou and the Han Dynasties in Luoyang came from the building base location, burning kilns, burning hole and grave at that time.

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矿工们挖去表层土，然后把这些闪着点点金光的粘土铲进一个灰坑内，用酸来提取出稀土矿。

Miners scrape off the topsoil and shovel golden-flecked clay into dirt pits, using acids to extract the rare earths.

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