Ssf
abbr. saybolt seconds furol 赛波特弗洛（粘度计）秒数; single-seated fighter 单坐战斗机; standard saybolt furol (viscosity) 标准赛波特糠醛（黏滞性）
🗣️ 情景例句
the school poster for the play this year.
今年学校话剧的海报。
This is a TV set.
这是一台电视机。
They aren't very busy!
他们不很忙吧！