Undocumented
a. 无正式文件的, 无事实证明的
🗣️ 情景例句
That's OK. Everybody else does, too. See you tomorrow.
没关系。大家都是这样。明天见。
How's your brother?
你的兄弟好吗？
I was thinking about next Tuesday.
我想下个礼拜二。