Op. cit.
abbr. 前面引用的书(in the work already quoted)
🗣️ 情景例句
Here it is.
在这里。
Don't bother him.
不要打扰他。
The world had to wait almost another 100 years for the Channel Tunnel.
世界不得不再等将近100年才看到海峡隧道竣工。