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 occurred from...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 declinel reduction inthe...,reaching a figure of... 从这年起，...逐渐下降至...
45.be similar to... 与...相似
46.be the same as... 与...相同
47.there are a lot similarities/differences between...and......与...之间有许多相似(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。