这道线图题整体难度不是很大，描述了从2010到2017年游览加勒比海岛的游客数量的变化，属于比较常规的题。

关于分段，按照常规思路，大部分同学们可能会按照一条线分为一段来写，因为动态图分段原则是按照线的趋势来分段，三条线整体趋势都是上升的；但其实很多同学都忽略了一点，也就是这道题独特的地方，就是最上面的线是表示总数的，数量是下面两条线的总和。所以分段可以是下面两条线对比着一起写。

因此每段的整体思路是这样的：total线这条线数量显著上升，从1到3.5，除了2015-2016平稳了一年。下面两条线都呈现上升趋势，且分别从0.7到1.5,0.3到2；2013年之前，上面线明显高于下面线；之后两条线的差距逐渐缩短，上面线在1.5保持不变，稍有下降后，再次上升；下面线急剧上升，在2017年高于另一条线。

首段改写按照常规改法即可，The line graph illustrates the total number of visitors to an island in Caribbean, divided into two types: visitors staying on cruise ships and those on island. 

将主体段思路转为英文表达：The 7-year period witnessed a remarkable overall growth (1 million to 3.5 million visitors),  not significantly interrupted by the stagnant year of 2016(despite a plateau between 2015 and 2016). Specifically, visitors staying on island increased from 0.7 million to 1.5 million, and the other from 0.3 to 2 million.

During the first four years, visitors staying on the island were the obvious higher percentage, and accordingly, a lower percentage of visitors chose to stay on cruise ships. The subsequent years until 2016 saw the gap narrowing gradually, as the number of landed visitors stagnated/remained stable at 1.5 million for three years and started to/before a slip, and that of cruising visitors had a continuing surge. As a surge continued during the years after, cruising visitors accounted for the larger portion, although the number of landed visitors rose again.

这篇例文从评分标准的词汇一项来说，得分比较高，很多单词表达可替换常用常规表达，如：a remarkable overall growth中，remarkable可替换为noticeable, obvious, apparent, marked。stagnant 可替换为stable, steady, still, unchanged。subsequent可替换为following。landed visitors, cruising visitors 主语多样化。stagnate可替换为动词词组remain stable。a continuing surge中account for可替换为take up, occupy, constitute, provide等

从语法一项来说，也做的很好，首先主语多样性，

①时间做主语：The 7-year period witnessed a remarkable overall growth  

②人做主语： visitors staying on island increased from 0.7 million to 1.5 million

③量做主语：the number of landed visitors remained stable /stagnated at 1.5 million for three years

④趋势做主语： a surge continued during the years after

其次，非谓做状语 

The 7-year period witnessed a remarkable overall growth (1 million to 3.5 million visitors),  not significantly interrupted by the stagnant year of 2016

此句可替换成: despite +n  /although +句子形式

然后，并列结构省略动词

visitors staying on island increased from 0.7 million to 1.5 million, and the other from 0.3 to 2 million.

两者间比较： the +比较级+n 

visitors staying on the island were the obvious higher percentage

还用到了See +宾语+补语 

The subsequent years until 2016 saw the gap narrowing 以及一些as 状语从句 ； and 或者 before /after 结构表示连续变化

The subsequent years until 2016 saw the gap narrowing gradually, as the number of landed visitors remained stable /stagnated at 1.5 million for three years and started to/before a slip

同学们今后在练习或考试时，遇到线图题不要急于分段，细致分析每条线表示什么含义之后再做决定；将每段思路想清楚后再落笔，平时练习过程中表达都要掌握的非常熟练，考试时才能得心应手，保证句式多样性，词汇准确性，逻辑严谨性。