Sdb
abbr. 存储数据缓冲器（Store Data Buffer）
🗣️ 情景例句
After you.
请先走。
No, thank you.
不，谢谢您。
On the day before our departure, several bus loads of tourists descended on the town.
我们离开小镇的前一天，镇上来了几辆满载游客的公共汽车。