这种狗是通过拉布拉多犬和金毛寻回犬杂交培育而成的。

This dog was ___cross-bred from a Labrador and a Golden Retriever.

这种狗是由拉布拉多和贵宾犬杂交培育的。

This dog is a ___cross-bred between a Labrador and a Poodle.