Gray wolves are their ancestors.
灰狼是狗的祖先。
What are the main differences between red wolves and gray wolves?
红狼和灰狼的嘴拙要区别是什么？
At one time, gray wolves were among the most widely distributed mammals on Earth.
有一次，灰狼群是其中分布最为广泛哺乳动物在地球。
At one time, gray wolves were among the most widely distributed mammals on Earth.
有一次，灰狼群是其中分布最为广泛哺乳动物在地球。
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