We must be free not because we claim freedom, but because we practice it.
我们必须自由,不是因为我们宣称自由,而是因为我们践行自由。
对黑洞的研究彻底改变了我们对空间和时间的理解。
The science of government it is my duty to study, more than all other sciences; the arts of legislation and administration and negotiation ought to take the place of, indeed exclude, in a manner, all other arts.