1·Exercise can produce endorphins.
运动可以产生内啡肽。
2·Scientists believe that this makes your muscles tiring, so we start to produce endorphins.
科学家认为这会使你的肌肉疲劳，所以我们体内开始产生内啡肽。
3·Laughter also increases the release of endorphins, compounds that give you a sense of well-being, in your brain.
笑声也可以增加内啡肽- - -一种在我们大脑里可以带给我们幸福感的化合物地释放。
4·Scientists tell us that laughter is good for our health; that it releases endorphins and other positively powerful chemicals into our system.
科学家告诉我们，笑对我们的健康有好处；它释放内啡肽和其他含积极能量的化学物质到我们的肌体。
5·These soothing feelings most likely result from the release of endorphins, brain chemicals that relieve pain and can produce euphoria.
这些舒缓的感受最可能是释放内啡肽的结果，它是大脑化学物质可以产生兴奋和缓解疼痛。