... an original edition 原版 an underground organization地下组织 an unexpected guest 不速之客 ...
双语例句
1
Anundergroundorganization has claimed responsibility for the bomb explosion.
一个地下组织已声称对炸弹爆炸事件负责。
《柯林斯英汉双解大词典》
2
In November, the Earth Liberation Front, anundergroundorganization, gave warning that it had "spiked" trees in the Nez Perce national forest to protest against logging.