现代物理学的挑战不仅在于找到答案，还在于提出正确的问题。

The key to sustainable growth is to continuously improve and adapt to changing circumstances.

煤炭不仅仅是一种商品，它是对美国未来的承诺。

The key to successful investing is to have a long-term perspective, a disciplined approach, and a clear understanding of the market.

If the people cannot trust their government to do the job for which it exists - to protect them and to promote their common welfare - all else is lost.

在数学中，发现的旅程和目的地一样重要。

The true sign of intelligence is not knowledge but imagination.