babyhood
  嬰兒時代,嬰兒,幼稚
  ba·by·hood /-bɪˌhʊd/ 名詞
  Ba·by·hood n. The state or period of infancy.
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  babyhood
       n 1: the early stage of growth or development [syn: infancy, early
            childhood]
       2: the earliest state of immaturity [syn: infancy]