"an unwritten law"
"rites...so ancient that they well might have had their unwritten origins in Aurignacian times"
"an oral tradition"
"an oral agreement"
"he made a few ad-lib remarks"
Diseases unwritten in medical books.
出自: N. Hawthorne
The unwritten law that priests and journalists have a right to protect their sources.
出自: A. MacVicar
Conforming to this unwritten and indeed unspoken rule.
出自: A. Brookner
以上内容独家创作,受著作权保护,侵权必究
海词词典,十七年品牌