Sppa
abbr. single-pumped parametric amplifier 单频抽运参量放大器; Society for the Preservation of Poultry Antiquities 家禽古迹保护协会
🗣️ 情景例句
Bye.
再见。
To climb stairs
爬楼梯
Oh, I must go home.
噢，我必须回家了。