雅思小作文常用表达：
总述：according to the/ as can be seen from the / it is clear/apparent/obvious from the figures that...
组成：make up/occupy/constitute/account for/take up
排名：a ranked/ the highest/ est with the figure of, followed by B and C
比较：a is almost/nearly/over/approximately a quarter/half/one/third/twice/four times as many/much/long/large as B/ A is N times that of B
变化趋势
上升：increase/ go up/rise/grow/shoot up/soar/jump/rocket/climb/take off
下降：come down/drop/decrease/decline/fail/slide/slip/shrink/collapse/plunge/plummet
波动：fluctuate/zigzag/up&down/wave/level off frequently
稳定不变：hold/remain/stay at the same level
谷值：reach a lowest point/bottom out at
峰值：reach a peak/peak at/top out at/summit at