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一直以来人们都认为,“笑口常开”对健康有利,但德国法兰克福大学的研究者却表示,违背人们意愿的笑其实对健康有害,可能导致许多疾病的产生。
It has always been believed that “laughter” is good for health, but researchers at the University of Frankfurt in Germany have said that laughing against the wishes of the people is actually harmful to health and can lead to many diseases.