首先，在阅读网上评论和信息这件事上应该三思。

To begin with, one should think twice upon reading online comments and information.

演讲，是在公共场合针对一定话题现身说法，比起网上评论者的身手可说是更胜一筹。

Yet those on-line commentators would pale beside the speaker who voices his opinion on an issue directly to the public.