1. The phrase is common diplomatic parlance for spying. 这种说法是对间谍行为的常用外交辞令。
2. He kept spying on the criminal's actions. 他一直在监视罪犯的行为。
3. It exposes us and our friends to disagreeable spying. 它使我们和我们的朋友暴露在令人不快的监视之下。
4. After a strike by cartoonists in 1941, he agreed to work for the FBI secretly, identifying and spying on colleagues who he suspected were anti-government. 在1941年漫画家罢工后,他同意秘密为联邦调查局工作,确认并监视他怀疑的反政府的同事。