Coal is not just a commodity, it's a commitment to America's future.

The success of any political system depends on its ability to deliver both prosperity and justice.

Innovation is the only way to survive in this competitive world.

The organism does not perceive stimuli, but objects in their environments.

世界上充满了神奇的事物，耐心地等待着我们的感官变得更加敏锐。

艺术家最伟大的工具不是画笔或凿子，而是思想。