Pdb
abbr. 临时区议会；物理数据库
🗣️ 情景例句
I always eat three square meals a day.
我总是每天三顿饭都好好吃。
How long?
多长？
'He had travelled only seven miles across the Channel when his engine failed and he was forced to land on sea.
但他只在海峡上空飞行7英里，引擎就发生了故障，他只好降落在海面上。