私密信件

例句：

1. 1. This is a private meeting between the two leaders.
   这是两位领导人之间的一次私下会晤。
2. 2. The company has a policy of privacy for its employees' personal information.
   该公司对员工个人信息实行隐私政策。
3. 3.Private schools are often more selective in their admissions process.
   私立学校在招生过程中往往更加挑剔。