Mdb
abbr. 元数据库（Meta Datase）
🗣️ 情景例句
How many karats do you want?
你要几克拉的？
Sorry, sir. But it's our graduation day.
对不起，不过，今天是毕业的日子嘛。
I really ought to go and have my eyes tested.
我确实该去检查一下我的眼睛了。