定理不是偶然发现的。
煤炭的未来取决于我们创新和减少其环境影响的能力。
The only thing that counts is what cannot be explained.
A proof tells us where to concentrate our doubts.
革命者可以失去一切:家庭、自由,甚至生命。但不能失去道德。
将每个困难分解为尽可能多且必要的部分来解决它。
Adaptability is what separates successful businesses from the rest.