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)