如何使用 "levigate" 造句

1. 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。”