金山词霸致力于为用户提供高效、精准的在线翻译服务，支持中、英、日、韩、德、法等177种语言在线翻译，涵盖即时免费的AI智能翻译、英语翻译、俄语翻译、日语翻译、韩语翻译、图片 …

Animal experiments by psychologists at the University of Pennsylvania had shown that after repeated failures, most animals conclude that a situation is hopeless and beyond their control.

金山词霸致力于为用户提供高效、精准的在线翻译服务，支持中、英、日、韩、德、法等177种语言在线翻译，涵盖即时免费的AI智能翻译、英语翻译、俄语翻译、日语翻译、韩语翻译、图片 …

"Meals are the foundation of the family," says Carole Counihan, a professor at millersville University in Pennsylvania, "so there was a very important interconnection between eating …