上千年来人类一直在通过选择性杂交繁育来改变狗类的大小、体型、颜色和皮毛。
For thousands of years humans have changed the sizes, shapes, colors, and coats of dogs through selective breeding.
“这是一项在动物治疗中受到欢迎的有益补充，因为狗类的肥胖问题看起来在不断增加。”Stephen Sundlof, FDA兽医医学中心主任说。
'This is a welcome addition to animal therapies, because dog obesity appears to be increasing,' said Stephen Sundlof, director of the FDA's Center for Veterinary Medicine.
耶和华说，我命定四样害他们，就是刀剑杀戮，狗类撕裂，空中的飞鸟，和地上的野兽吞吃毁灭。
And I will appoint over them four kinds, saith the LORD: the sword to slay, and the dogs to tear, and the fowls of the heaven, and the beasts of the earth, to devour and destroy.
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