undated [ʌnˈdetɪd]

例句:

• 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
• Undated Heineken handout photo of a bottle of its lager.
  来自THETIMES
• In one undated memo, the CIA proposes establishing a permanent presence in Libya.
  来自NPR
• That form is undated.
  该表未注明日期.
  
• 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.
  
• The audio recording, posted on a web site, includes an undated photograph of the al-Qaida leader.
  来自VOA