31. There is not a great deal of difference between...and...

......与......的区别不大。

32. The graphs show a threefold increase in the number of...

该图表表明......的数目增长了三倍。

33 ....decreased year by year while...increased steadily.

......逐年减少，而......逐步上升。

34. The situation reached a peak (ahigh pointat) of …%.

......的情况（局势）到达顶（高）点，为......百分点。

35. The figures/situation bottomed out in...

数字（情况）在......达到底部。