视频：美副总统拜登称中国不能自由呼吸 (Video Clip of Biden at UPenn Commencement: China is “a Nation Where You Cannot Breathe Free”)
Sina, May 23, 2013
http://video.sina.com.cn/p/news/w/v/2013-05-23/183362463245.html
Related:
中国留学生要求美国副总统为“不当言论”道歉 (UPenn Chinese Students Ask Biden to Apologize for Criticizing China)
British Broadcasting Corporation, May 23, 2013
http://www.bbc.co.uk/zhongwen/simp/world/2013/05/130523_us_biden_china.shtml
