Sfsu
abbr. signal frequency signaling unit 信号频率信令单元
🗣️ 情景例句
I heard a lot of shouting, what's up?
我听见很多喊声，出了什么事了？
I'll be ready within five minutes.
我五分钟内就可以准备好了。
An ocean wave passing through deep water causes a particle on the surface to move in a roughly circular orbit,
穿过深水的海浪使水面上的一个微粒按照一种近乎圆形的轨道移动，