Previous radiation experiments on animals may give a clue for the increase in male births.

舍布博士称，先前在动物身上进行的核放射性实验也许会为男婴出生率的增高提供一些线索。

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Previous radiation experiments on animals may give a clue for the increase in male births.

舍布博士称，先前在动物身上进行的核放射性实验也许会为男婴出生率的增高提供一些线索。

youdao