When you are stuck, sleep on it. Let your subconscious work for you.
The only way to get better is to compete against the best.
科学最重要的意义在于它为我们提供了一种方法,可以提出能够明确回答的问题。
我不是一个为了娱乐而写作的作家。我写作是为了激发思考并挑战现状。