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.

　　環(huán)境學家指出：持續(xù)增加的污染不僅會導致像全球變暖這樣嚴重的問題，而且還將威脅到人類在這個星球的生存。

 

　　34. In view of such serious situation， environmental tools of transportation like bicycle are more important than any time before.

　　考慮到這些嚴重的狀況，我們比以往任何時候更需要像自行車這樣的環(huán)保型交通工具。

 

　　35. Using bicycle contributes greatly to people‘s physical fitness as well as easing traffic jams.

　　使用自行車有助于人們的身體健康，并極大地緩解了交通阻塞。

 

　　36. Despite many obvious advantages of bicycle， it is not without its problem.

　　盡管自行車有許多明顯的優(yōu)點，但是它也存在它的問題。