他们有些薄如纸，白如玉；有些粗如陶，黑如漆。这是一件产自公元14世纪的青花瓷。它的拍卖价高达2000多万英镑，是中国瓷器的骄傲之作Some are ____; some are as white as jade; some are as course as pottery; and some are as black as lacquer. This is an extraordinary piece of _____ made in the 14th century. It was ____ at more than 20 million pounds It is the pride of ci qi.