- prematurity
- 不: a block of wood
- 到期: fall due
- 不到期的: premature
- 未成熟的;过早的;不到期的: premature
- 到期: become due; mature; expire; at maturity; due(of an obligation) 他们的执照已到期。 their licences have expired. 这票据什么时候到期? when does the bill fall [become] due? 签证下月到期。 the visa expires next month
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