文学是使不可见之物可见的艺术。
我们必须记住，文学不仅仅是娱乐，它还有更深的意义。
光的理论实际上是弹性介质振动的理论。
听听他们的言论，看看他们的实际行为，考察他们的能力，谨慎的授予官职。
The future of life on Earth depends on our ability to take action. Many individuals are doing what they can, but real success can only come if there is a change in our societies and our economics and in our politics.