宝库bǎokùtreasure-house; treasury; treasure troveHSK 7-9PronunciationbǎokùExample sentence这座古城是中华文明的宝库。zhè zuò gǔ chéng shì zhōnghuá wénmíng de bǎokùThis ancient city is a treasure house of Chinese civilization.Read and choose an answerOne fixed sampleExplore a sample