第三人称单数： levigates
过去式： levigated
过去分词： levigated
现在分词： levigating

Though the japanese production of stonewares was cheaper , it was still too labour-intensive because their clay was more difficult to mine and levigate than jingdezhen 's , " curtis explains .

柯蒂斯解释道：“尽管日本石器的生产成本较低，但劳动密集程度过高，因为相对于景德镇瓷器而言，日本的陶土较难开采和磨光。”