Sfsu
abbr. signal frequency signaling unit 信号频率信令单元
🗣️ 情景例句
It's hard to say. I like volleyball a lot, but I guess I like tennis better.
很难说，我喜欢排球，但我想我比较喜欢网球。
I'm glad our negotiation has come to a successful conclusion.
我很高兴这次洽谈圆满成功。
Was he absent from school last week?
上星期他没上学吧？