数学的本质在于它的自由。
The essence of mathematics lies in its freedom.
The folly of humankind lies in complicating the simple.
艺术无关美，而关乎真实，即使它丑陋。
自然法则支配着一切。
真相并不总是美丽的，美丽的言辞也不总是真相。
Agricultural research should address national needs and solve practical problems, it cannot be separated from production practice.