密告者

例句：

1. 1. The secret agent wasa master of deception and could easilybe mistaken for a confidant.
   这位间谍擅长欺骗，很容易被误认为是密友。
2. 2. The police were looking for the informant who had provided crucial information to theauthorities.
   警方正在寻找那位向当局提供关键信息的告密者。
3. 3. Theconfidant shared herfears with the president, hopingto receive support from him.
   这位密友向总统倾诉了她的担忧，希望他能给予支持。