The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.
抽象的目的不是模糊，而是创建一个新的语义层次，在这个层次上可以绝对精确。
Natural experiments are a powerful tool for understanding causal relationships in the real world.
学习的最好方式是教学。
目标不是建得更多，而是建得更好。
The novel is the only art form capable of fully representing human complexity.
赏析：强调了孝子和忠臣应该以真诚和正直的态度对待父母和君主，而不是阿谀奉承。
作家的任务是让不可见之物可见。
