1. 他举了摩托车赛车手的例子，这些人从来不认为他们会遇上事故。
He gives the example of motorcycle racers who never think they will be involved in accidents.
2. 文章讲到：冒险除了害己害人外，不会有任何好处。
The article says there is no reward for taking apart from harming selves and others.
3. 发言人却称，对一些冒险者来说，从事这些冒险活动的过程中，既有化学方面的收获，又有心理上的收获。
The speaker asserts that for some risk-takers, there are both chemical and psychological rewards in the course of performing such risky activities.
4. 冒险者一般会有更强的自尊心、自信心，一般情况下在经济上和社会上都更为成功。
Risk-takers tend to have more self-esteem, self-confidence and are generally more successful financially and socially.
5. 总之，作者对冒险者赤全面否定的态度，而讲话人则持更公平判断的立场，说：一些冒险真的是不必要的，而有些则是重要的。
In summary, the writer holds an all-negative attitude towards risk-taking, the speaker takes a more fair-judge stance, saying that some risks are really unnecessary, but some others are important.
