Identical twins are also called monozygote twins because they develop from the splitting of a single fertilized egg.
因为是从同一个受精卵分裂而来，同卵双
也被称作单卵双。
Identical twins are also called monozygote twins because they develop from the splitting of a single fertilized egg.
因为是从同一个受精卵分裂而来，同卵双也被称作单卵双。
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