Task：Three graphs show the annual expenditure of university students in three countries in 2003.
思路解析：
1. 该图切不可每个饼一段，此类图形的特点在于类比，所以正确的分段原则为：具有共性的数据项在一组，具有差异性的数据项在一组;
2. 注意描述关键数据：最大值，最小值，均值等;
3. 注意呈现数据的对比：大小关系，倍数关系等。
参考范文：
The three pie charts show how university students in three countries spent their money in the year 2003.
In general, students in country A spent slightly more than those in country B (US$ 5,000 and US$ 4,500 respectively). In comparison, student expenditure in country C was considerably lower, at only US$ 1,500 per year.
Accommodation and food were the two biggest items of expenditure. Altogether they constituted around 60% of the total students' expenditure in all three countries. The difference is that in country A and B accommodation spending exceeded food spending while the reverse was true for country C.
The rest of the students' spending was divided among leisure, book and "others". Leisure spending constituted a larger percentage (around 20%) of student expenditure in both country A and B, while in country C more money was spent on book (21%) than on leisure (12%).
Overall, as wealth decreased, the percentage of students' spending on nonessential items went down.
(165 words)
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