December 25th, 1848. 1848年12月25日 My dear Sir, 尊敬的先生， I will write to you at more length when my heart can find a little rest— now I can only thank you very briefly for your letter. 待我心绪稍宁后，我再写信与你详叙；现在

And lastly, here's Destin, from "Smarter Every Day," 最后是《每天聪明一点点》的德斯丁， talking about the conservation of angular momentum, and, since it's YouTube, cats: 为我们讲述动量守恒，由于是在YouTube上，所以他用猫来举例： Hey, it's me,

And so let freedom ring from the prodigious hilltops of New Hampshire. Let freedom ring from the mighty mountains of New York. Let freedom ring from the heightening Alleghenies of Pennsylvania. Let fr

THE PRESIDENT: Good morning. Today I would like to talk to you about an urgent priority for our Nation: confronting the rising costs of health care. In my State of the Union Address, I invited Democra

So you should be incredibly proud 所以你们应该异常自豪 And I hope that you never lose sight of what brought you to this day 而且我希望永远不要忘记 是什么成就了这一天的你 those values that you came here with 也就是你们来到这里时所拥有的价值观 and tho