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1. Oxford Dictionary

   birth weight

   • n.
     the weight of a baby or young animal at birth

   • noun: birth weight, plural noun: birth weights

2. • 釋義

   n.

   名詞

   • 1. the weight of a baby or young animal at birth he weighed in a healthy 4.25 kilograms, a gain of 450 grams on his birth weight