21.over the period from...to...the...remained level.
在...至...期间，...基本不变。
22.in the year between...and...
在...年到...期间...
23.in the 3 years spanning from 1995 through 1998...
1995年至1998三年里...
24.from then on/from this time onwards...
从那时起...
25.the number of...remained steady/stable from (month/year) to (month/year).
...月(年)至...月（年)...的数量基本不变。
26.the number sharply went up to...
数字急剧上升至...
27.the percentage of...stayed the same between...and...
...至...期间...的比率维持不变。
28.the figures peaked at...in(month/year)
...的数目在...月（年）达到顶点，为...
29.the percentage remained steady at...
比率维持在...
30.the percentage of...is sightly larger/smaller than that of...
...的比例比...的比例略高（低）。
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(ahigh pointat) 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）
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 in the...,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。