骡子是公驴和母马交配而生的杂种动物。

A mule is a hybrid of a male donkey and a female horse.

《牛津词典》

小偃54是一个具有杂种优势、品质优良的小麦品种。

Xiaoyan 54 wheat is of high quality and has an advantage of crossbreed.

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实践证明，杂种优势利用是提高油菜产量的主要途径。

To achieve this, heterosis utilization is proved to be a very effective way.

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实践证明，杂种优势利用是提高油菜产量的主要途径。

To achieve this, heterosis utilization is proved to be a very effective way.

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