若使用投影片，切记，一般规则如下：一张投影片不超过一分钟。每张投影片只陈述一个概念。投影片上的字能少就少。
If you show PowerPoint slides, remember that the general rule of thumb is no more than one slide a minute, one idea per slide and as few words as possible.
应试教育，一张可怕的网，我想能漏网的鱼寥寥无几，像韩寒那样的漏网之鱼我看是少之又少。
Oriented education, a terrible network, I would like to be able to fall through, few fish, such as Han Han slip through the net as I see very few...
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