Spd
abbr. 电涌保护器；补充石油税；统计过程诊断（Statistical Process Diagnosis）
🗣️ 情景例句
That's out of the question.
决不可能。
It's a small world.
世界真小！
You wouldn't have met her if it hadn't been for him.
如果不是他，你就见不到她。