骡子是母马和公驴的杂交后代。

A mule is a cross between a mare and a donkey.

youdao

骡子是母马和公驴的杂交后代。

MULE is a cross between a mare and a donkey.

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这种异种杂交是非常有限的，因为他们的后代是不育的。

Such interbreeding is usually limited because the offspring are sterile.

youdao

这种异种杂交是非常有限的，因为他们的后代是不育的。

Such interbreeding is usually limited because the offspring are sterile.

youdao