This is the 7527th most frequent Chinese word.
警告信
Warning letter.
In this sentence, '警告信' refers to a formal warning letter issued by an organization, highlighting potential consequences for certain actions.
他收到了公司的警告信。
He received a warning letter from the company.
Here, '警告信' is used in the context of a disciplinary action by an authority figure to address a rule violation.
老师给学生写了一封警告信，因为他违反了纪律。
The teacher wrote a warning letter to the student because he violated the rules.
In this sentence, '警告信' is discussed generically as a preventive tool to address or mitigate future problems.