So there's things you can't do, and these limitations on the human voice have always really annoyed me, 所以说，总有声响是你发不出来的，这些人声的局限总是困扰我呀 because beatbox is the best way of getting musical ideas out of yo
The second story has to do with something that I'm sure most of you have seen or will remember. 第二个故事，和那些我相信你们大多数人都见过或者记得相关事情。 Very often, countries in Africa suffer drought and floods, 非洲的国家常常遭受干旱和洪涝
Thank you. 谢谢大家。 I have only got 18 minutes to explain something that lasts for hours and days,so I'd better get started. 我只有18分钟的时间来讲一件持续了数天数夜的事情，所以最好述不宜迟， Let's start with a clip from Al Jaz
