先根据横轴分析变化，然后再进行比较。
第一段介绍核心信息(e.g。时间地点研究对象);一句话即可
第二三段先分析第一个时间点，再分析后一个时间点。
二、雅思小作文曲线图常用句型&短语
Excel in something = have advantage in something
1.图表描述：The graph shows/illustrates/displays …
2.表程度：Fell dramatically/significantly/astonishingly/considerably/steadily to approximately 100 and 200 respectively; noticeable decrease
Slightly/marginally more women than men …
3.表上升：The graph showed an upward trend/ something soars to…;雅思写作词汇 Increase/ rise/ grow/ go up/ improve/ climb/ boom/ leap
4.表下降：decrease/fall/drop/dip/go down/decline/reduce
Exceed/overtake/outnumber – e.g. Men with postgraduate diplomas clearly outnumbered their female counterparts。
5.数值相同：Coal as a source for only 25 units of electricity in 1980， which was matched by natural gas
数值不方便时可用括号表述。
6.讨论类：An intermediary position between both solutions is the perfect way to …
Can be a vehicle (=solution/way/method etc。) for reinvigorating (振兴) …
From a pragmatic point …
Foresee certain cases of exemptions
Make = yield (产出成果、效果、收益etc。)
7.提出自己观点：While I admit that…/I am convinced that…
8.其他：Beyond our wildest expectations
Inevitable = inescapable
Underground railway systems = subway networks
Genetic factors & environment / nature & nurture
