Take a look at this drawing. Can you tell what it is? 请看这幅图。大家知道这是什么吗？ I'm a molecular biologist by training, and I've seen a lot of these kinds of drawings. 我是一个接受过训练的分子生物学家，因此我已经看过了很多这类图片。 They're u

南非首位黑人总统和反种族隔离偶像纳尔逊・曼德拉于当地时间5日去世，享年95岁。英国首相卡梅伦发表电视讲话悼念曼德拉。 英语演讲稿： Tonight, one of the brightest lights of our world has gone out. Nelson Mandela wasn’t just a hero of our time, but a hero of all

Hello, morehouse 你好 莫尔豪斯 Thank you, everybody. Please be seated 谢谢大家 请就坐 I love you back 我也爱你 That is why i am here 所以我才来到这里 I have to say that 我想说 It is one of the great honors of my life 能为这个毕业典礼进行演

And in doing so, we were breeding them for parasitism. 为了做到这点，人类用喂养的方式来让它们寄生于我们。 We were giving them all sorts of reasons to adapt new ways. 我们给了动物们适应新环境的各种理由。 So, for example, rats are incredibly res

　　Back in New York, I am the head of development for a non-profit called Robin Hood. When I'm not fighting poverty, I'm fighting fires as the assistant captain of a volunteer fire company. Now in our