角质甲

certified mail───挂号信；保证邮件

certified mails───挂号信

coffin nail───（美俚）香烟；（美俚）烟鬼

cornified───角质化的；角化的

fortified pa───强化pa

fortified pas───强化pas

certified milks───合格牛乳

• cornified nail
• cornified means
• cornified layer