1. 他們逮捕的那位因進行間諜活動的高級文職人員，原來是20年前敵人情報機構(gòu)安插的特洛伊木馬。
   The senior civil servant they arrested for spying turned out to be a Trojan horse, planted by enemy intelligence twenty years previously.
2. 這一事件理所當(dāng)然地堪稱是國王間諜活動的的獨一無二的史詩。
   The episode could reasonably serve as a unique epic of royal espionage!
3. 間諜的，驚險的以戲劇性的陰謀為特征的，常常指間諜活動
   Marked by melodramatic intrigue and often espionage.
4. 他正在干間諜活動時被抓住了。
   He was caught in the very act of espionage.

間的英語翻譯：

諜的英語翻譯：

活動的英語翻譯：