I am always interested in traveling. My reasons are quite (extremely) simple and clear. If anybody is not satisfied with my viewpoint(s), I shall be greatly surprised at his ways of thinking. In the first place, traveling increases our knowledge. Only by traveling can we see （因为用（only）开头，主动词须颠倒）things outside our home town.
In the second place, traveling is good to our health. While we are traveling, we usually exercise our bodies.
In conclusion, I earnestly hope that everybody must seize (grasp at) the opportunity of traveling.
我对旅行终是感觉有趣。我的理由非常简单时了。如果任何人对我的观点不满意的话，我将对他的想法会大大吃惊。
旅行增加我们的知识。只有藉旅行我们可以看到我们故乡以外的东西。
旅行对我们的健康有益。
当我们旅行的时候，我们通常运动我们的身体。
旅行对我们的健康有益。
当我们旅行的时候，我们通常运动我们的身体。