知识无疆界
TED-B站
TED Talks are influential videos from expert speakers on education, business, science, tech and creativity, with subtitles in 100+ languages. Ideas free to stream and download.
八季TED演讲集
TED官方-优酷
网易公开课汇集清华、北大、哈佛、耶鲁等世界名校共上千门课程，覆盖科学、经济、人文、哲学等22个领域，在这里你可以开拓视野看世界，获取有深度的好知识。
TED官方-土豆
