Undocumented
a. 无正式文件的, 无事实证明的
🗣️ 情景例句
Thank you very much for preparing such a splendid dinner specially for me.
谢谢您为我特意准备如此丰盛的晚餐。
May I take your message?
你需要留言吗？
Please ask her to call me back when she's back.
她回来时请让她给我回个电话。