释义：求学之人若不勤奋，必然是其志向不坚定。
眼睛是什么也看不见的，一定要用心去看。
In the realm of algorithms, efficiency and elegance are not mutually exclusive but are often two sides of the same coin.
言辞是一种行动，我们的词汇是我们用来执行这种行动的工具。
最优财政政策要求税率随时间平稳变化，仅对政府支出的永久性变化作出反应。
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.
The state of nature has a law of nature to govern it, which obliges every one: and reason, which is that law, teaches all mankind, who will but consult it, that being all equal and independent, no one ought to harm another in his life, health, liberty, or possessions.