When I was nine years old, I went off to summer camp for the first time. 当我九岁的时候，我第一次去参加夏令营。 And my mother packed me a suitcase full of books, which to me seemed like a perfectly natural thing to do.
Upon conclusion of the P5+1 meeting regarding Iran, President Obama sends a strong message on behalf of the international community: Iran must take “concrete action” in regards to its nuclear program.
But now, notice there are two ways of seeing the cube, right? 现在，你注意到了有两种方法来看那个立方体，对吧？ It's a Necker cube. 这是一个内科尔方块。 Everybody can see the two ways of seeing the cube? OK. 大家都可以看出两种看方块的方法吧？好的 Can
