translation.en: And I'm here to tell you, if there's anything more intimidating than talking here at TED, it'll be trying to hold the attention of a group of a thousand 12-year-olds for a 45-minute lecture.
translation.zh: 我现在想告诉你们， 如果真的有什么比在TED做演讲还难的话， 那就是尝试保持他们的注意力 一群上千个12岁的孩子，并保持45分钟。