单词：fraternal twins
fraternal twins的用法和样例：
例句
- Dizygotic twins arise from two separate eggs fertilized by two spermatozoa.异卵双生子是由两个精子与两个不同的卵受精而成长起来的。
- This did not hold for fraternal twins, who are only halfway similar genetically.而这一现象在那些在遗传上只有小部分相同的异卵双生子中并不存在。
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