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。