Sfsu
abbr. signal frequency signaling unit 信号频率信令单元
🗣️ 情景例句
Don't forget to use primer first when you paint the house.
刷房子之前别忘了刮底漆。
An open door may tempt a saint.
一扇开著的大门可诱惑一个圣徒。
When he was decorating his house, he had gotten the bedroom painted first.
他装修房子时，先刷了卧室。