单词 | unless |
释义 | unless/ʌnˈlɛs /conjunction Except if (used to introduce the case in which a statement being made is not true or valid): unless you have a photographic memory, repetition is vital manuscripts cannot be returned unless accompanied by a self-addressed envelope...
OriginLate Middle English: from on or in (assimilated through lack of stress to un-1) + less. |
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