密事

例句：

1. 1. The government has been keeping a close eye on the secret matter.
   政府一直在密切关注这个秘密事务。
2. 2. He kept his secret matter to himself until he was ready to share it with others.
   他直到准备好与他人分享之前，一直保守着他的秘密事务。
3. 3. The company's top executives were discussing the confidential matter in private meetings.
   公司的高级管理人员正在私下讨论这个机密事务。