You can't manage what you don't measure.
你无法管理你无法衡量的东西。
尊重孩子正在进行的所有合理的活动并试着了解，是我们教育方法中最首要的原则。
"The unsaid is often more powerful than the spoken word."
The environment is a long-term issue that requires long-term commitment.
The best strategy is simple but not easy.
The human understanding， when it has once adopted an opinion， draws all things else to support and agree with it.