[TOP]undated un·dated / ˌʌnˈdeitidʃOŋð> / adjective1. without a date written or printed on it  未注日期的: an undated letter 一封没写日期的信 2. of which the date is not known  日期不明的;时间不详的: undated archaeological remains 时间未确定的考古遗迹 ⇨ compare dated[TOP]undated un·dat·ed / ʌnˈdetɪd ; ʌnˈdeɪtəd / adjective1. a letter, article, painting etc that is undated does not have a date written on it 未标明日期的 [TOP]undatedUK [ʌn'deɪ.tɪd] US [-tˌɪd] adjective » An undated document has no date on it (档)未注明日期的 The cheque/letter was undated. 支票/信上没有日期。 [TOP]undated
1.ADJ 形容词 无日期的;未注明日期的 Something that is undated does not have a date written on it.
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。