From the bar chart given above, we can observe that the electricity consumption in a small city experienced some changes during the past several years. From 2004 to 2007, it increased by 2.51% from 4.6 million kilowatt to 4.723 kilowatt. However, it decreased by 0.8% from 4.723 in 2005 kilowatt to 4.7 kilowatt in 2006. Then it increased by 12.88% to 5.26 million kilowatt in 2007. The bar chart reveals the phenomenon that the electricity consumption rises with some fluctuations. What exactly contribute to this phenomenon ? Reasons can be listed as follows: in the first place, with the improvement of financial status and living standard, electrical appliances such as television sets , refrigerators, washing machines , air conditioners and so on are becoming increasingly widespread , however all these machines will not only offer us great convenience, but consume more electricity. Moreover, factories located around the city are also main factors of the rising of electricity consumption. Last but not least, the absence of citizens consciousness of economizing on electricity also leads to the rising of consumption. The rapid increase of electricity consumption shows that it has been playing an indispensable role in our life. Vital to all aspects of modern life, electricity is far from being sufficient. Accordingly, it is urgent that every one of us should foster the consciousness of saving electricity.
从上面给出的条形图中，我们可以看到，在过去几年里，一个小城市的电力消费经历了一些变化。从2004到2007，从4600000千瓦提高到4.723千瓦到2.51%千瓦。然而，它下降了0.8%，从4.723到2005千瓦，2006千瓦4.7。然后，它增加了12.88%至5260000千瓦的2007。条形图揭示了电力消耗随波动增加的现象。究竟是什么促成了这一现象？原因可以列出如下：首先，财务状况和生活水平提高，电气设备，如电视台，冰箱，洗衣机，空调等都变得越来越普遍，然而所有这些机器将不仅提供我们伟大的方便，但消耗更多的电力。此外，工厂位于城市周边也是电力消费上升的主要因素。最后但并非最不重要的，公民的节电意识的缺乏也导致消费上升。电力消费的快速增长表明，它在我们的生活中扮演着不可或缺的角色。对现代生活的方方面面，电是远远不够的。因此，我们每个人都应该树立节约用电的意识。