不要害怕在观点上与众不同,因为现在被接受的每个观点都曾经是古怪的。
Natural experiments are a powerful tool for understanding causal relationships in the real world.
如果我们致力于正确的技术,可持续的煤炭行业是可能的。
The most important quality in a man is courage. Without it, the other qualities are worthless.
The past is always with us, and it's always more complicated than we think.