根据同学们的考场回忆，Describe Image 里简单图出现的频率还是比较高的，但同学们也不能放松了那些较为复杂的图的练习。今天我们就举例详地说说其中两道。

有一些Bar Chart 并不像线图一样清晰，往往它们的坐标更为复杂。说的时候如果没有一个清晰的逻辑，就容易乱了分寸。比如这道常考题：

这是一道横置的柱状图，横坐标非常简单是金钱（连贯的数字坐标）。纵坐标分成了四块，每块代表一个季度，同时每个季度有三种产品。这样，我们在描述的时候应把重点focus在如何有逻辑地根据纵坐标来describe。

值得注意的是，虽然纵坐标是分季度的，但实际上也是按时间顺序排列的。所以我们就可以根据这一点按照产品类型（X, Y, Z）分别讲述。

1. 总起句：介绍image的主要内容
2. Product Z
3. Product Y
4. Product X
5. Implications (if you have) 

参考答案：This bar chart shows the sales of three products by quarters. It is quite clear that Products Z had the highest sales among all the products throughout the year, which started at about $13,000 in Quarter1, and then dropped to $5,000 in Quarter4 with some fluctuations in the process. In contrast, Product Y had the lowest average sales for the year, which dropped from $ 3,000 in Quarter 1 to $ 1,000 in Quarter2. It then increased dramatically but dropped again ending up with a sale of $ 2,500 in Quarter. When you look at Product X, it just decreased steadily from $ 10,000 in Quarter 1 to $ 2,000 in Quarter. 

还有一种bar chart, 它和上图很像，却又有一些不同，比如：

同样我们先来看一下他的坐标，纵坐标很简单是百分比。横坐标是不同的transport mode。对比上题的季度坐标，这里的transport mode不具有时间上的连贯性，但是我们可以发现每一种Mode里面却又是按照时间排列的，也就是说是可连续的，所以我们同样可以抓住这一点进行论述：

1. 总起句：介绍主要内容

2. 介绍接下来的每一种mode, 注意在说的时候突出对比

3. Implications (if you have)

参考答案：This bar charts displayes the the change of proportions for each transport mode from 1960 to 2000. When you look at bus, it grew from 18% in 1960 to its top at 26% in 1980 and then fell back to 16% in 2000. The story for car was different, whose percentage increased dramatically from 6% in 1960 to 36% in 2000. In contrast, both bike and foot had a declining trend through the 40 years. Bike's figure dropped from 25% to 7%, and foot's proportion decreased even more seriously from 34% to 9%. 

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