Mdb
abbr. 元数据库（Meta Datase）
🗣️ 情景例句
After you.
请先走。
The doctor said I looked worried and nervous.
医生说我看起来太忧郁和紧张了。
'I'm hanging this picture on the wall,' I answered.
我正将图片挂到墙上去呢，我回答