Sef
abbr. 海峡交流基金会（Straits Exchange Foundation）；严重误码帧（ Severely Errored Frame）；钠排泄因子（sodium excreting factor ）
🗣️ 情景例句
one of the best tennis players on the Michigan team--
当年Michigan球队最好的网球选手--
This time didn't count. Do it over!
这次不算，重来！
Thanks, we appreciate the fast work.
谢谢你们这么快就办好了。