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26. 在给出我的观点之前，我想看看双方的观点是重要的。
Before giving my opinion, I think it is important to look at the arguments on both sides.
27. 这一观点正受到越来越多人的质疑。
This view is now being questioned by more and more people.
28. 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。
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.
29. 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。
In view of such serious situation, environmental tools of transportation like bicycle are more important than any time before.
30 尽管自行车有许多明显的优点，但是它也存在它的问题。
Despite many obvious advantages of bicycle, it is not without its problem.
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