當(dāng)餅圖的數(shù)據(jù)按照時間變化時，我們可以將其轉(zhuǎn)換為折線圖的方式來安排數(shù)據(jù)，比如：

You should spend about 20 minutes on this task.

The charts below show the percentage of their food budget the average family spent on restaurant meals in different years. The graph shows the number of meals eaten in fast food restaurants and sit-down restaurants.

You should write at least 150 words.

Give reasons for your answer and include any relevant examples from your own knowledge or experience.

Over the past 30 years, the average family has dramatically increased the number of meals that they eat at restaurants. The percentage of the family's food budget spent on restaurant meals steadily climbed. Just 10 percent of the food budget was spent on restaurant meals in 1970, and 15 percent in 1980. That percentage more than doubled in 1990, to 35 percent, and rose again in 2000 to 50 percent.

二、橫向數(shù)據(jù)的對比的餅圖或者單個餅圖

針對以上的餅圖，朗閣海外考試研究中心建議考生采用的寫作思路可以是先寫總數(shù)，一般用簡單句來實現(xiàn)；然后再按照扇形面積大小逐一描寫。比如：

Write a report for a university lecturer describing the information below.

You should write at least 150 words.

You should spend about 20 minutes on this task.

In the year 2000, Coca-Cola sold a total of 17.1 billion cases of their fizzy drink product worldwide. The largest consumer was North America, where 30.4 per cent of the total volume was purchased. The second largest consumer was Latin America. Europe and Asia purchased 20.5 and 16.4 per cent of the total volume respectively, while Africa and the Middle East remained fairly small consumers at 7 per cent of the total volume of sales.