Coal built this country, and coal will keep it strong.

The world needs pragmatic solutions, not just idealistic visions.

The knowledge of the circumstances of which we must make use never exists in concentrated or integrated form, but solely as the dispersed bits of incomplete and frequently contradictory knowledge which all the separate individuals possess.

单靠技术无法拯救水产养殖，有远见的人才能。

生命中最伟大的荣耀不在于从未跌倒，而在于每次跌倒后都能站起来。

物理学的美丽在于它能够用简单的原理解释复杂的事物。