The very first hot dog — the "dachshund" sausage in a roll — was sold by Germans in New York.
第一个热狗——“腊肠狗”香肠卷,由德国人在纽约出售。
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Like trainers raising dog puppies, the scientists gave the Wolf pups intensive obedience training, teaching them to sit, lie down, roll over, and look into a person's eyes.