adj.未注日期的，日期不明的，时间不详的

The undated check was cashed without any issue.
这张没有日期的支票没有任何问题就被兑现了。
The undated letter arrived at the post office.
这封没有日期的信件送到了邮局。
The museum displayed an undated ancient artifact.
博物馆展出了一件无年代可考的古董。
The undated event was mentioned in historical texts.
这个无具体日期的事件被历史文献提及。
The undated photo was found in an old family album.
这张无日期的照片在旧的家庭相册中被发现。
The undated contract was signed by both parties.
这份无日期的合同由双方签署。
The undated painting was attributed to a famous artist.
这幅无日期的画作被归功于一位著名艺术家。
The undated diary entry was found among old papers.
这本日记中无日期的一条记录在一堆旧文件中被找到。
The undated news report covered a significant event.
这份无日期的新闻报道涵盖了一个重要事件。
The undated legal document was reviewed for accuracy.
这份无日期的法律文件被审核以确保其准确性。