unwritten
US /ʌnˈrɪt̬.ən/
UK /ʌnˈrɪt.ən/
形容词
不成文的, 口头的
not written down or recorded
示例:
•
There's an unwritten rule that you don't talk about politics at family dinners.
有一条不成文的规定，家庭聚餐时不要谈论政治。
•
The history of the tribe was passed down through unwritten stories and songs.
部落的历史通过口头故事和歌曲传承下来。