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
I just have my driver's license with me. Is that enough.
我身上只带了驾驶执照，这样够了吗？
Please turn the light off when you leave.
离去时请随手关灯。
You must weigh it carefully.
你必须仔细地称一称重量。