Sffd
abbr. step-function frequency discriminator 阶跃函数鉴频器
🗣️ 情景例句
Where is your hometown?
你的籍贯是哪里？
I played in the yard this afternoon.
我今天下午在庭院玩。
Let's see if we can work it out to your satisfaction.
我来看看是否有什么办法能让你满意。