31. This view is now being questioned by more and more people. 这一观点正受到越来越多人的质疑。

32. Although many people claim that, along with the rapidly economic development, the number of people who use bicycle are decreasing and bicycle is bound to die out. The information I've collected over the recent years leads me to believe that bicycle will continue to play extremely important roles in modern society. 尽管许多人认为随着经济的高速发展，用自行车的人数会减少，自行车可能会消亡， 然而，这几年我收集的一些信息让我相信自行车仍然会继续在现代社会发挥极其重要的作用。

33. Environmental experts point out that increasing pollution not only causes serious problems such as global warming but also could threaten to end human life on our planet. 环境学家指出：持续增加的污染不仅会导致像全球变暖这样严重的问题，而且还将威胁到人类在这个星球的生存。

34. In view of such serious situation, environmental tools of transportation like bicycle are more important than any time before. 考虑到这些严重的状况，我们比以往任何时候更需要像自行车这样的环保型交通工具。

35. Using bicycle contributes greatly to people's physical fitness as well as easing traffic jams. 使用自行车有助于人们的身体健康，并极大地缓解了交通阻塞

36. Despite many obvious advantages of bicycle, it is not without its problem. 尽管自行车有许多明显的优点，但是它也存在它的问题。

37. Bicycle can't be compared with other means of transportation like car and train for speed and comfort. 在速度和舒适度方面，自行车是无法和汽车、火车这样的交通工具相比的。

38. From what has been discussed above, we may safely draw the conclusion that advantages of bicycle far outweigh its disadvantages and it will still play essential roles in modern society. 通过以上讨论，我们可以得出结论：自行车的优点远大于缺点，并且在现代社会它仍将发挥重要作用。

39. There is a general discussion these days over education in many colleges and institutes. One of the questions under debate is whether education is a lifetime study. 当前在高校和研究机构对教育存在着大量争论，其中一个问题就是教育是否是个终身学习的过程。

40. This issue has caused wide public concern. 这个问题已经引起了广泛关注。