So they're learning from each other. And research bears this out. 乌鸦通过互相学习，都掌握了这种技巧。 Parents seem to be teaching their young. They learn from their peers, they learn from their enemies. 乌鸦父母还教会自己的孩子这样
Before we begin this examination, I would like you to imagine a national coin-flipping contest. Let’s assume we get 225 million Americans up tomorrow morning and we ask them all to wager a dolla
We are also working on the start of a bigger project in Bali. It's a movie about happiness. 我们还在巴厘岛开始了一个更大的项目，是一个讲关于快乐的电影。 And here we asked some nearby pigs to do the titles for us. They weren't quit
I’d like to speak with you for a few minutes today about the tragedy that took place at Ft. Hood. This past Thursday, on a clear Texas afternoon, an Army psychiatrist（精神病医师） walked into the Sold
