Undocumented
a. 无正式文件的, 无事实证明的
🗣️ 情景例句
Come on in, everybody.
大家请进来。
Come on now-buck up-face the music-nose to the grindstone.
快振作起来，面对现实，埋头苦干。
Excuse me for ringing you so late in the evening, but I've only just got home.
对不起，这么晚给你打电话，我刚到家。