名詞 spying:

1. keeping a secret or furtive watch
2. the act of keeping a secret watch for intelligence purposes
   同義詞：undercover work
3. the act of detecting something; catching sight of something
   同義詞：detection, catching, espial, spotting

動詞 spy:

1. catch sight of
   同義詞：descry, spot, espy, spy
2. watch, observe, or inquire secretly
   同義詞：spy, stag, snoop, sleuth
3. secretly collect sensitive or classified information; engage in espionage
   同義詞：spy

1. His job as a diplomat was a blind for his spying.
   他擔任外交官的職務是為了給他的間諜身分打掩護。
2. She was accused of spying for the enemy.
   她被指控為敵方間諜。
3. For eight years she was in fact spying for the enemy.
   八年來她實際上一直為敵人做間諜工作。
4. He was expelled from the country for spying on their naval bases.
   他因刺探該國海軍基地的情報而被驅逐出境。
5. The senior civil servant they arrested for spying turned out to be a Trojan horse, planted by enemy intelligence twenty years previously.
   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年前敵人情報機構安插的特洛伊木馬。