雅思写作技巧分享：小作文里饼图的比较
* 数据图：【饼图】
* 主要描述：【比较】。注意：比较关系存在于每个饼内部的板块，也存在于饼之间。
# Introduction
Shown in the set of three pies are the average percentages of three substances consumed in Americans’ meals. in general, there are apparent similarities and notable differences.
* 开头段落中的第1句话的划线部分是老章反复提及的倒装现象。
* 开头段落中的第2句话，既是对图表的总述，也是套话，还有词汇得分点（表示程度的形容词）。
# Body
老章强烈建议，在展开主体部分的写作之前，对图表中的信息进行分组：找到异同。一般说来，相同或相似在一组。然后，去对比于不同的一组。
First, the similarity between the intake of sodium and that of saturated fat is marked: in dinner, American people take in the largest portion (43% and 37% respectively) of a day’s whole amount of the two nutrients they consume. The second highest daily intake of sodium (29%) happens in lunch and is twice of the intake when Americans eat breakfast or snacks. Third, in terms of the consumption of saturated fat, there are no wide variations but a 5% difference between the meals except dinner.
The case with added sugar is vastly different. 42% – a predominating percentage – of added sugar is taken in during eating snacks, making a sharp contrast with the 16%-23% during the three regular meals.
* 最后这个段落，两句话。第1句话是用第三个饼去比较于前两个饼。第二句话是第三个饼内部的比较。
# Conclusion
Overall, since those substances may cause health problems if eaten in excessive amounts, Americans should be most careful when they eat dinner and snacks.
* 这个结尾段落的写作内容有一些难度。难点在于超越了数字，去解读数据暗示的信息（但是注意，这个解读是安全的，是基于题目中的“all of which may be unhealthy if eaten too much”而来的）。
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