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[期刊论文] 作者：Ａｌｉｎｅ Ａｌｅｘａｎｄｅｒ Ｎｅｗｍａｎ,
来源：疯狂英语·中学版 年份：2007
翻译：洪馥芝 Did you ever get the feeling your dog was laughing at you? New research suggests maybe he was! Dogs make ?)huffing?noises scientists think is doggie laughter. Dogs make that noise when invit...
[期刊论文] 作者：Ａｌｉｎｅ Ａｌｅｘａｎｄｅｒ Ｎｅｗｍａｎ,
来源：疯狂英语·中学版 年份：2008
“Humans have a code of ethics[道德规范],” says Marc Bekoff, an animal behavior expert at the University of Colorado. “If I don’t play a certain way, you won’t play with me. Some animals have the same code...
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