Annual Cycles of the Traffic Accident of a City
城市交通事故年变化
Traffic accidents are one of the most serious problems in modern cities. Many people have lost their lives every year.
The two graphs show the comparison of traffic accident cycles in a city for the past two years ( 2003 and 2002 ) . In each graph, the arrow indicates the annual average point for each traffic accident. The chart for 2003 tells us that most traffic accidents happened in December, while early spring (March ) has a relatively higher percent. Traffic accidents decrease from April to October, and July has the lowest percentage of traffic accidents for 2003.
In 2002, the low points lasted for five months, from May to September. The yearly peak of accidents was in February. In comparison with that in 2003, the percentage of peak points decreased by 30%. The variation between monthly traffic accident percentages is much less than that of 2003.
作文结构分析：
·引言
· 2003 年情况描述
· 2002 年情况描述以及与2003 年的比较
作文内容分析：
本文是一篇图表作文, 这类作文首先要看清图表, 写作时要写得清楚扼要, 没有必要写每月的的变化或作计算, 只需写清每年的高峰、低谷和平稳期, 然后将两年的情况作一比较。
单词词组：
the arrow indicates... 箭头指示为……
relatively ad. 相对地
last v. 持续
yearly peak 每年高峰
in comparison with... 与……相比较
variation n. 变化
