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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
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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
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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
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