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(a high point at) 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。

36.the figures reached the bottom/a low point/hit a trough.

数字(情况)达到底部(低谷)。

37.a is ...times as much/many as b.

a是b的...倍。

38.a increased by...

a增长了...

39.a increased to...

a增长到...

40.high/low/great/small/ percentage.

比低高(低)