TED演讲：是什么造就了长城的无与伦比，好好学习下，下次向外国朋友介绍的长城的话就不会没有话说了。A 13,000 mile dragon of earth and stone winds its way through the countryside of China 一条1万3英里的土石之龙蜿蜒于中国乡野之间， with a history almost as long and serpent
THE PRESIDENT: Good morning. The policy of the United States is a Korean Peninsula free of all nuclear weapons. This morning, we moved a step closer to that goal, when North Korean officials submitted
And so it is everywhere one looks. 这一现象在世界各地都在发生。 The human juggernaut is permanently eroding Earth's ancient biosphere by a combination of forces that can be summarized by the acronym HIPPO, the
And two days later I came to do my next emergency shift, and that's when my chief asked to speak to me quietly in her office. 两天后，又轮到我在急诊室值班。那时我的主任要我去她的办公室里私下谈谈。 And she said the three words: Do you r
