因果框架是科学推理的基础。
The causal framework is the foundation of scientific reasoning.
你只活一次，但如果你做得对，一次就足够了。
世界上最好和最美丽的东西是看不见甚至摸不到的——它们必须用心去感受。
War is the ultimate human drama, where the best and worst of humanity is revealed.
If you want to solve big problems, start by asking the right questions.
天文学的历史是一部视野不断退却的历史。