雅思小作文折线图对比模板如下：

首先，我们需要简要描述图表的标题和所展示的时间段。例如：“The line graph compares the sales of two different products, A and B, over a period of five years from 2016 to 2020.”

接下来，我们需要对两条线的整体趋势进行描述。例如：“Both products A and B experienced significant growth during the five-year period. However, the sales of product A increased more rapidly than product B, particularly in the later years.”

然后，我们需要分析两条线之间的交叉点。例如：“In 2018, the sales of product A and product B were equal, with both achieving a sales figure of 100 units. After that point, the sales of product A began to outpace product B.”

接下来，我们需要按照时间顺序，对每一条线的趋势进行详细描述。例如：“From 2016 to 2017, the sales of product A increased slightly, from 50 units to 70 units. However, from 2018 onwards, the sales of product A increased rapidly, reaching a peak of 150 units in 2020. On the other hand, the sales of product B increased steadily throughout the five-year period, from 50 units in 2016 to 120 units in 2020.”

最后，我们需要总结图表的主要趋势和差异，并可能提出一些建议或结论。例如：“Overall, the sales of both products A and B increased over the five-year period, with product A experiencing a more rapid growth rate. This suggests that product A may have been more popular or had better marketing strategies than product B. Future marketing efforts should focus on maintaining the momentum of product A while also increasing the sales of product B.”

请注意，这只是一个模板，具体的描述和分析需要根据具体的图表数据和要求进行调整。同时，还需要注意语言的准确性和流畅性，以及避免使用过于复杂的句式和词汇。