如何開始一個演講

joke maybe not a good idea because at this time your audience might not fit to listening a joke, they are adjusting to your speaking style

在開始時提供一個有力的保證，告訴聽眾你能在接下獲得什么可能更好

samples

1. cycle：重要的事情說三遍

2. building fence：使得你的觀點和別的觀點區(qū)別開，防止混淆

3. verbal punctuation: 比如outline來幫助聽眾跟上進度

4. question：