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。
Scientists tell us that laughter is good for our health; that it releases endorphins and other positively powerful chemicals into our system.
这是生态学家安德鲁·布劳斯汀，他告诉我们，科学家们最近对可能造成几百万只蛙类和其他两栖类动物死亡的疾病有了更多了解。
That's ecologist Andrew Blaustein. He told us that scientists have recently learned more about diseases that may be killing millions of frogs and other amphibians.
然后，科学家们告诉研究对象组里其他人的估计数字。
The scientists then gave their subjects access to the guesses of the other members of the group.
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