行文框架：

开头段：点明立场

主一段：反方让步

主二段：正方观点

结尾段：重申立场

开头段：

While reading some news about dangerous sports, we can often see some people get hurt seriously or even die. This is why a group of people strongly suggest our governments to ban those sports that might severely harm participants or kill them. In my mind, this is not necessary at all.

主一段：

For one thing, advocates for forbidding these sport activities assert that taking part in them means putting sportsmen in great danger. Once they are injured or killed, they are not the only people who have to suffer from this unnecessary pain, and those who love them like their family members also feel miserable. In fact, the unsafety of this kind of sports can to a great extent be reduced, and what we need is the adequate professional guidance, advanced protective gears, and related strict administration. With all of these, everyone is able to enjoy doing these sports with very limited risk of injury.

主二段：

For another, people certainly have the right to choose the sport they are crazy about, since we all can give a long list of merits of doing sports. For instance, the sports economy is playing a significant role in more and more regions that focus on the development of their tourism. Some extreme sports fans tend to go to Switzerland for alpine skiing, New Zealand for skydiving, and Macao of my country for bungee jumping. They not only contribute to the advancement of local economy, but also can enjoy the feeling that most people in the world cannot gain, like the sense of weightlessness.

结尾段：

n conclusion, instead of banning these dangerous sports, governments ought to set up rules to restrain them, showing the would-be participants what they can do and cannot do, and how they can do these sports safely. In other words, people do have the freedom to choose the sport activities as they wish as long as they comply with relevant regulations.

总结如下：

双边讨论的本质也可以是一件事的正反面