TED演讲:行星猎者的冒险(3)
66 million years ago, a much larger object hit the Earth, causing a massive extinction. 六百六十万年前，一个更大的物体撞击地球，造成了物种大灭绝。 75 percent of plant and animal species were lost, including, sadly, the di
TED演讲:行星猎者的冒险(4)
One of the reasons NEOWISE is so valuable is that it sees the sky in the thermal infrared. NEOWISE有这样高价值的原因之一便是它使用红外感应观测天空。 That means that instead of seeing the sunlight that asteroids reflect, NEOWI
TED演讲:为什么MOOC仍然重要(1)
I'd like to reimagine education. The last year has seen the invention of a new four-letter word. 我想要重新定义教育。去年出现了一个新的四字单词。 It starts with an M. MOOC: massive open online courses. 以M开头的缩写词MO
TED演讲:为什么MOOC仍然重要(2)
Everything else has changed around us. You know, from healthcare to transportation, everything is different, but education hasn't changed. 生活中一切其他的事物都在改变。从医疗业到运输业一切都有所变化，但是教育领域仍
TED演讲:为什么MOOC仍然重要(3)
So at edX and a number of other organizations, we are applying these technologies to education through MOOCs to really increase access to education. 所以在edX网站和一些其他的组织我们将这些技术应用于教育通过MOOCs，真正增加
TED演讲:为什么MOOC仍然重要(4)
I call it teen-lish. It's a digital language. It's got two sounds: a grunt and a silence. 我称之为少年语言。它是一种数字式的语言。它有两种声音：咕哝声和沉默。 Honey, come over for dinner. Hmm. Did you hear me? Silenc
TED演讲:为什么MOOC仍然重要(5)
But what if we embraced technology, embraced the millennial generation's natural predilections, 但如果我们使用在线技术，接受千禧一代天生的优待， and really think about creating these online technologies, blend them into their
TED演讲:为什么MOOC仍然重要(6)
We were also doing other pilots. So we did a pilot experimental blended courses, working with San Jose State University in California, 我们也在做其他的试验。我们做了一个试验性的混合实验课程，再一次关于电路与电子技
TED演讲:为什么MOOC仍然重要(7)
And this is a form of learning called active learning, 这是一种学习形式叫做主动学习， and really promoted by a very early paper, in 1972, by Craik and Lockhart, where they said and discovered that learning and retention 早期文件显示
TED演讲:为什么MOOC仍然重要(8)
Learners are telling us that they go to bed at night dreaming of the green check mark. 学习者告诉我们，他们晚上上床睡觉都做着绿色对号的梦。 In fact, one of our learners who took the circuits course early last year, 事实上，
TED演讲:为什么MOOC仍然重要(9)
Let me tell you a story. When we did our circuits course for the 155,000 students, 给大家讲一个故事。当我们的电路课程要为那155,000的学生上线时， I didn't sleep for three nights leading up to the launch of the course. 为了引
TED演讲:为什么MOOC仍然重要(10)
It can also solve a practical problem of MOOCs, the business aspect. 它也能解决大规模网络公开课在其商业方面的实际问题。 We can also license these MOOC courses to other universities, 我们还可以授权这些网络公开课面
TED演讲:如何用创新来克服危机?(1)
The first half of the 20th century was an absolute disaster in human affairs, a cataclysm. 20世纪的上半叶是人类历史上一个彻底失败的阶段，那是一场浩劫。 We had the First World War, the Great Depression, the Second World Wa
TED演讲:如何用创新来克服危机?(2)
Communication walls, I don't have to tell you -- the Internet -- have come tumbling down. 通信壁垒，不用我多说，随着互联网的出现也已不复存在了。 And of course the iron curtains, political walls have come tumbling down. 当然
TED演讲:如何用创新来克服危机?(3)
And we can see the tragedy of Africa in the first few bars here. Growth was negative. 我们可以看到非洲的悲剧就从这个条形图的前几个条。负增长！ People were actually getting poorer than their parents, and sometimes even poor
