牛大叫，但马却不回应；不是因为马没听到声音，是因为它们不是同类啊。点评：同类之间存在着客观联系，故能相应。
The goal is not to simply eliminate the bad, but to pursue and experience the best in the world.
Never underestimate the power of simplicity in design and execution.
我们成功的真正衡量标准是我们为后代留下了什么。
The interplay between quantum mechanics and general relativity is one of the most profound puzzles in modern physics, and solving it may require a complete rethinking of our understanding of the universe.
The best anti-poverty program is a growing economy with good jobs.