在英语中，饼图通常被用于展示数据的比例或百分比。

以下是写作饼图作文的万能模板：
1. Introduction: 描述饼图的目的是什么，以及它要传达的主要信息。

For example, the pie chart below displays the percentage of total income spent on various categories by households in a certain city.
例如，下面的饼图展示了某个城市家庭总收入在各类别的花费百分比。

2. Description of the Pie Chart: 描述饼图中每个部分的大小和含义。

As shown in the pie chart, the largest proportion, approximately 35%, is allocated to housing expenses. This is followed by expenses on food and non-alcoholic beverages, representing approximately 20%.
如饼图所示，最大的一部分，约占总数的35%，是住房支出。

接下来是食品和非酒精饮料的支出，约占总数的20%。

3. Comparison: 比较饼图中各部分的大小，突出重要信息。

For instance, the proportion of housing expenses is significantly higher than that of other categories. This indicates that housing costs are a significant burden for many families in this city.
例如，住房支出的比例明显高于其他类别。

这表明住房成本对这个城市的许多家庭来说都是一个沉重的负担。

4. Conclusion: 基于饼图提供的信息得出结论。

Based on the pie chart, it is evident that housing expenses are the primary component of household spending, highlighting the need for affordable housing options in this city.
根据饼图，显然住房支出是家庭支出的主要组成部分，这突出了这个城市对经济适用住房的需求。