Some of the most amazing innovations that improve the world are hidden in plain sight.改善世界的一些最令人惊奇的创新隐藏在普通的视野中。 Bill Gates invites you to play this game of hide and seek and find out if you can spot them. 比尔盖茨邀请你去玩这个捉迷藏游戏，看看你能不能认出他们Learn more at http://b-gat.es/2opCwpu学习更多：http://b-gat.es/2opCwpu