真相很少是纯粹的，也从不简单。
"The truth is rarely pure and never simple."
We are not doing e-commerce; we are doing social e-commerce.
The best policies are those that last longer than a political term.
The past is a foreign country; they do things differently there.
课程必须被视为帮助孩子解释自己的经验并指导他进一步经验的手段。