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;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。
雅思小作文曲线图常用句型短语：
Excel in omething = have advantage in omething
图表描述:：The graph how/illutrate/diplay
表曲线：
表程度：Fell dramatically/ignificantly/atonihingly/coniderably/teadily to approximately 100 and 200 repectively; noticeable decreae
Slightly/marginally more women than men
表上升 The graph howed an upward trend/ omething oar to Increae/ rie/ grow/ go up/ improve/ climb/ boom/ leap
表下降：decreae/fall/drop/dip/go down/decline/reduce
Exceed/overtake/outnumber e.g. Men with potgraduate diploma clearly outnumbered their female counterpart.