Undocumented
a. 无正式文件的, 无事实证明的
🗣️ 情景例句
How about some music?
来点音乐怎么样？
What time should I be at the departure gate?
我在什么时间到登机门？
He looked very well though he was rather thirsty, for he drank half a bottle of milk.
它看上去一切正常，只是口渴得很，喝了半瓶牛奶。