While most of us know that we feel better after a good hearty laugh, science, in many cases, is yet to prove why.

While most of us know that we feel better after a good hearty laugh, science, in many cases, is yet to prove why.

虽然我们大多数人都知道开怀大笑之后会感觉更好，但在很多情况下，科学还没有证明其中的原因。

-- Allen Klein 艾伦·克莱恩