Coal will remain part of the energy mix, but it must be cleaner and more responsible.

Simplicity is a great virtue but it requires hard work to achieve it and education to appreciate it. Simplicity is the ultimate sophistication.

除了诱惑，我什么都能抵抗。

The biographer's challenge is to be both a detective and a poet.

数学的目标是理解我们观察到的现象背后的结构。

我是个无可救药的浪漫主义者，我认为这就是让我心跳的原因。