If it's true that if the dog did not know the visitor well the dog would have barked, if it's a good guide dog.

如果他是真的，如果狗不认识访客，狗就会叫，如果是个好的导向狗。

youdao

If it's true that if the dog did not know the visitor well the dog would have barked, if it's a good guide dog.

如果他是真的，如果狗不认识访客，狗就会叫，如果是个好的导向狗。

youdao