臣民的政治自由是每个人对自己安全感的平静心态。
The political liberty of the subject is a tranquility of mind arising from the opinion each person has of his safety.
你们要做愤世嫉俗者，还是踏实的建设者？
Creativity is not just about ideas—it’s about making them happen.
没有什么是一成不变的！
化学之美在于它能解释看不见的事物。