Sfm
abbr. surface feed per minute 表面/分钟流量; surface feet per minute 每分钟英尺表面线速度数，英尺/分表速
🗣️ 情景例句
It is too expensive. How about half the price?
太贵了，半价怎么样？
What time does the ship leave?
船什么时间启航？
Who is in charge here?
这里谁负责？