当随机化不可行时，匹配方法可以是一个强大的工具。
"Matching methods can be a powerful tool when randomization is not possible."
解析：君子要求的是自己，小人要求的是别人。
晶体管是一个等待被发现的发现。
In the pursuit of mathematical truth, we often find more questions than answers.
I don't think about being the best. I think about being better than yesterday.
每一种元素都有一个故事，每一个反应都在讲述一个故事。
The past is never dead. It's not even past.
通往可持续性的道路充满了挑战和机遇。