Do not claim you were not forewarned; used to emphasize that a clear warning or notice has been given, and any resulting issues are due to neglecting that warning.
经理在会议上再三强调了项目的截止日期，算是勿谓言之不预也了，大家可要抓紧时间啊。
The manager repeatedly emphasized the project deadline in the meeting, serving as a clear forewarning; everyone must seize the time and work diligently.
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