化学是物质的科学，但我更愿意将其视为变化的科学。
The only purpose for which power can be rightfully exercised over any member of a civilized community， against his will， is to prevent harm to others.
有生活目标的人几乎可以忍受任何方式。
Leadership in the coal industry today means navigating the delicate balance between economic necessity and environmental responsibility.
Every experiment is a question posed to nature, and every result is nature's answer.
有两样东西，人们越是经常持久地对之凝神思索，它们就越是使内心充满常新而日增的惊奇和敬畏：我头上的星空和我心中的道德律。
Doing the best at this moment puts you in the best place for the next moment.