Task：The total number of minutes (in billions) of telephone calls in Australia from 2001 to 2008.

　　思路解析：

　　典型的动态柱状图，请参考折线写法 :

　　1. 注意极值的描述：最大值，最小值，交点等;

　　2. 明显的数据特征：如保持不变，剧烈上升或下跌等，需要呈现。

　　参考范文：

　　The chart shows the time spent by Australian resident on different types of telephone calls between 2001 and 2008.

　　Local fixed line calls were the highest throughout the period, rising from 72 billion minutes in 2001 to just under 90 billion in 2003. After peaking at 90 billion the following year, these calls had fallen back to the 2001 figure by 2008.

　　National and international fixed line calls grew steadily from 38 billion to 61 billion at end of the period in question, though the growth slowed over the last two years.

　　There was a dramatic increase in mobile calls from 2 billion to 46 billion minutes. This rise was particularly noticeable between 2005 and 2008, during which time the use of mobile phones tripled.

　　To sum up, although local fixed line calls were still most popular in 2008, the gap between the three categories had narrowed considerably over the second half of the period in question.

　　(157 words)