Mdb
abbr. 元数据库（Meta Datase）
🗣️ 情景例句
What a beautiful day!
今天的天气真好！
We should keep them informed of what is going on here.
我们应该让他们知道这里发生的事情。[分词作定语]
You could save a lot if you would order a little more.
如果你单子下得多一点，可以省不少的钱。