This ability to make copies of DNA, as simple as it sounds, has transformed our world. DNA的这种复制能力听起来很简单，却改变了我们的世界。 Scientists use it every day to detect and address disease, to create innovative medic
American leadership 美国领导 In each of these cases, we should not expect change to happen overnight 所有这些情况下 我们都不应当指望变化在一夜间实现 That's why we form alliances not just with governments, but also with ordi
Steve Jobs: Now I’d like to talk about meaningful partners. Apple lives in an ecosystem, and it needs help from other partners. It needs to help other partners. And relationships that are destru
My fellow Americans, the federal government is charged with the sacred duties of protecting our nation, supporting our Constitution and defending our borders. 我的美国同胞们，联邦政府承担着保护国民、维护宪法和防护边界的神圣职责。 We al
What these things have in common is that kids will take a chance. 以上例子的共同点就是孩子们愿意冒险。 If they don't know, they'll have a go. Am I right? 对于未知的事物，他们愿意去尝试。难道不是吗？ They're not frightened of being wrong. I
