The first one, the electron, was discovered in 1897, and the last one, this thing called the tau neutrino, in the year 2000. Actually just -- I was going to say, just up the road in Chicago. I know it's a big country, America, isn't it?
第一个，电子，是1897年被发现的 然而最后一个，这个叫做陶子微中子的东西 是2000年被发现的。其实—— 我刚才想说，就是在马路那头的芝加哥，但是我反应过来了 美国超大的，是吧？