[不约而同 / 不約而同, bù yuē ér tóng, ㄅㄨˋ ㄩㄝ ㄦˊ ㄊㄨㄥˊ](set phrase) to take the same action or view without prior consultation; happen to coincide#13370[Add to Longdo]
[约定俗成 / 約定俗成, yuē dìng sú chéng, ㄩㄝ ㄉㄧㄥˋ ㄙㄨˊ ㄔㄥˊ]common usage agreement (e.g. paying one's bill in a restaurant); conventional contract#41503[Add to Longdo]
[ワシントンじょうやく, washinton jouyaku](n) (See CITES) Washington Convention (i.e. Convention on International Trade in Endangered Species of Wild Fauna and Flora)[Add to Longdo]