The truth is rarely pure and never simple.
真相很少是纯粹的，也从不简单。
Science must be a force for good in the world.
In the depth of the valley is the road to salvation.
Life would be tragic if it weren't funny.
当你停止在框架内思考并开始构建新框架时，创新就发生了。
我经常思考劳动和时间。