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       31. there is not a great deal of differencebetween...and...

　　...与...的区别不大。

　　32. the graphs show a threefold increase in thenumber of...

　　该图表标明...的数目增长了三倍。

　　33. ..decreased year by year while...increasedsteadily.

　　...逐年减少，而...逐渐上升。

　　34. the situation reached a peak(a high point at) of [%].

　　...的状况(形势)抵达顶(高)点，为...百分点。

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

　　数字(状况)在...到达底部。

　　36. the figures reached the bottom/a lowpoint/hit a trough.

　　数字(状况)到达底部(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)

       41. there is an upward trend in the number of... ...数字呈上升趋势。

　　42. a considerable increase/decrease occurredfrom...to... ...到...发生急剧上升。

　　43. from...to...the rate of decrease slow down. 从...到...，下降速率减慢。

　　44. from this year on，there was a gradual declined reductionin the..., reaching a figure of...

　　从这年起，...逐渐下降至...

　　45. be similar to... 与...类似

　　46. be the same as... 与...相同

　　47. there are a lot similarities/differencesbetween...and... ...与...之间有许多类似(不同)之处

　　48. a has something in common with b a于b有共同之处。

　　49. the difference between a and b lies in... a与b之间的差别在于...

　　50. ... (year)witnessed/saw a sharp rise in... ...年...急剧上升。