premature

premature
adjective
  1. occurring or done before the usual or proper time; too early
    比正常时间早的；提早的，过早的
    the sun can cause premature ageing.
    阳光能导致未老先衰。
    [with infinitive]it would be premature to do so at this stage.
    在这个阶段这样做恐怕为时过早。
    ■(of a baby) born before the end of the full term of gestation, especially three or more weeks before
    （婴儿）（尤指提前三周以上）早产的，早产儿的
派生
prematurely
adverb
  1. [as submodifier]prematurely grey hair.
    少白头。
prematurity
noun
语源
  1. late Middle English (in the sense 'ripe, mature'): from Latin praematurus 'very early', from prae 'before' + maturus 'ripe'
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