Tear Down This Wall 拆掉这堵墙吧 Remarks at the Brandenburg GateWest Berlin, GermanyJune 12, 1987 里根最知名的演讲，就是1987年在柏林布兰登堡门下，他向苏联领导人戈尔巴乔夫呼吁道：“戈尔巴乔夫总书记，如果你想为苏联和东欧谋取和平、繁荣和自由的话，到这扇大门这儿来吧，打开这扇大门，拆掉这堵墙吧。&rd
But to put that in context: 我们把这些数字写下来： 5.93 million years ago 593万年前 was when our earliest primate human ancestors stood up. 我们人类的祖先灵长类开始了直立行走 That was the first upright primate. 这是第一种直立行走的灵长类动物 Okay
So me and my group, L.A. Green Grounds, we got together and we started planting my food forest, fruit trees, you know, the whole nine, vegetables. 因此我和我的团队，“洛杉矶绿地”，我们聚在一起开始种植自己的食物森林，果树，还有整整九种蔬菜。 What
So, enough scientists in other disciplines are really asking people to help, and they're doing a good job of it. 足够多的科学家在其它领域正寻求大家帮忙，而且大伙也干的不错。 For instance, there's eBird, where amateur birdwatchers
