Dsb
abbr. double sideband 双边带; double-strength B (quality glass) 双B强度（玻璃质量）
🗣️ 情景例句
May I please speak to Mr. Kong?
我可以孔先生讲话吗？
I visited her last Wednesday.
我上个星期三拜访她。
Each day is a holiday,and ordinary holidays, when they come,
每天都是假日，而通常的假期到来时，