Op. cit.
abbr. 前面引用的书(in the work already quoted)
🗣️ 情景例句
There's no need to rush.
没有必要急急忙忙。
His courage is a lesson to us.
他很有勇气，是我们大家的榜样。
I apologize for being so angry with you.
我为跟你发火向你道歉。