Sfsu
abbr. signal frequency signaling unit 信号频率信令单元
🗣️ 情景例句
He's a terrific doctor, Mom.
爸爸是个了不起的医生， 妈妈。
Her attitude towards him has changed.
她对他的态度改变了。
Good morning, Mr Coal. I hear that you are one of the best detectives in the capital.
早上好，科尔先生。我听说你是首都最优秀的侦探之一。