"left without indication of date," 1560s, from un- (1) "not" + past participle of date (v.1) "assign a date to." Compare similarly formed German undatirt, Dutch ongedateerd, Swedish odaterad.
实用例句
1. That form is undated.
该表未注明日期.
来自《现代汉英综合大词典》
2. In each packet there are batches of letters, most of which are undated.
每个包裹里都有一摞摞的信件，其中大部分都没有日期。
来自柯林斯例句
3. The video plays the audio over a undated photograph of bin Laden.
该盘影像带在播放时带有本·拉登的最新图像.
来自互联网
4. David Halberstam in an undated photo taken in Vietnam.
记者大卫·哈伯斯塔姆在越南的照片未标日期.
来自互联网
5. There are no studies and the painting is undated and unsigned.
