Sffd
abbr. step-function frequency discriminator 阶跃函数鉴频器
🗣️ 情景例句
What do you recommend today?
今天你推荐什么沙拉？
She was disappointed by what Lawrence said.
她对劳伦斯说的话感到失望。
Dickie left the shop without a word and returned carrying a large cloth bag.
迪基二话没说就走了。一会儿，他带着一个大布口袋回到店里。