单词	be hard on
释义	请查阅词条：hard
随便看	letters of marque letters of marque letter space letters page letters patent letters rogatory letterss letter stamp letters testamentary letter stick letter sweater letter weigher letterweight letter-winged kite letterwood letterword letter-worship letter writer let the cat out of the bag let the cat out of the bag let the cat out of the bag about let the cobbler stick to his last let the cobbler stick to his last let the grass grow under one's feet let the side down 豆浆豆渣豆猪豆瓣儿酱豆秸豆绿豆腐豆腐乳豆腐干豆腐浆 Eigenresonanz Eigenrisiko Eigenschaft Eigenschaft Eigenschaftswort Eigenschutz Eigenschwingung Eigenschwingungsdauer Eigenschwingungsfrequenz Eigenschwingungsperiode