在心理学领域，正常与异常之间的界限往往是模糊和主观的。
In the realm of psychology, the line between normal and abnormal is often blurred and subjective.
In the realm of quantum materials, the concept of topology provides a powerful lens through which we can understand and predict new phases of matter.
人们总是认为他们会写一本书。他们认为他们会写一本书，然后他们没有。
追求数学知识是一场永无止境的冒险。
最大的风险是不冒险。
思考是智力的劳动，梦想是智力的欢愉。