Let's take a final example that's prominent in contemporary political debate: same-sex marriage. 最后再举一个例子，一个当代政治的热点话题：同性婚姻 There are those who favor state recognition only of traditional marri
By the end of each week,the students take a quiz,hand in their homework,which are assessed by their peers under the supervision of the instructors,get a grade, move to the next week. 每周结束的时候，学生们参加一个测验
Hi, everybody. This week, I'm speaking to you from our Nuclear Security Summit. I welcomed more than 50 leaders from around the world to make sure we're working together to meet one of the gre
The Olympic Spirit, the Spirit of Bipartisanship, and Health Reform The President takes a moment to congratulate our Olympic athletes. Discussing the unity and pride Americans feel in cheering them on
