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
I'm sick and tired of you!
你让我烦透了。
My hobby is collecting stones.
我的嗜好是收集石头。
Not all sounds made by animals serve as language.
动物发出的声音不都是用作语言交际。