英语翻译Other tests have shown that laughter appears to be capab

英语翻译Other tests have shown that laughter appears to be capable of reducing the effect of pain on the body.In one experiment doctors produced pain in groups of students who listened to different radio programs.The group,which tolerated the pain for the longest time,was the group,which listened to a funny program.The reason why laughter can reduce pain seems to be that it helps to produce endorphins（内啡肽）in the brain.These are natural chemicals that diminish both stress and pain.请标准翻译,