And I must say, before I go on, I should ask every one of you to try and get out pen and paper because I'm actually going to ask you to help me to look at how we do that.
在我继续之前，我想请在座每一位朋友， 拿出纸和笔， 因为我将会请大家和我一起试试，看我们是怎样找出答案的。