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
You'd better hurry, Robbie.
你最好快点， Robbie。
I'm afraid you will fail.
我怕你会失败。
How long have you been learning English?
你学英语有多久了？