a diagram that uses lines or narrow rectangles (= bars) of different heights (but equal widths) to show different amounts, so that they can be compared 条形图，柱形图（以不同长度的条形表示不同数量以作比较） 
The bar chart shows what the average American consumes in a year compared with other nationalities. 该条形图所示为美国人与其他国家居民年平均消费量的比较。
