在山的静默中,人发现风的流动;在森林的寂静中,人听见大地的声音。
Environmental stewardship is not optional - it's our responsibility to future generations.
热机的动力与实现它的工质无关;其量仅由最终实现热量转移的物体之间的温度决定。
Sustainability isn't an option—it's an imperative for the future of energy.
爱是最强烈的关注形式。
The purpose of life is the pursuit of truth and virtue.