It seems that cancer is a direct result to injury. If you smoke, you damage your lung tissue, and then lung cancer arises. 研究表明，癌症是由损伤直接导致的，如果你吸烟，损害了你的肺部组织，就会引起肺癌。 If you drink, you damage your liver,

I first found out about this confrontation when I was in graduate school, and it kind of blew me away. 我第一次听说这个故事的时候还在念研究生，这个故事让我太惊讶了。 I mean, how could the word scientist not have existed until 1833?

My fellow Americans, tonight I want to speak to you about what the United States will do with our friends and allies to degrade and ultimately destroy the terrorist group known as ISIL. As Commander-i

Weekly Address: Tuition-Free Community College (April 11, 2015) 奥巴马每周电视讲话：副总统乔拜登呼吁免除社区大学学费 Ladies and Gentlemen, this is Joe Biden and I'm here filling in for President Obama, who is traveling abroad.

But they shouldn't lose what they've already worked so hard to build in the process. 但是，他们不应当失去他们这么多年辛勤工作所获得的东西。 That's why Social Security and Medicare are more important than ever; we sh