社会热点类话题是考研大作文重要的一类话题，其中城市交通主题较为热门，下面我们就来看看这类主题的相关词汇。在积累词的同时，也不要忘记词在句中的应用。
1.traffic congestion / heavy traffic交通拥堵
例1：There is traffic congestion on the road with numerous private cars， trucks and buses。
译1：路上堵着许多私家车，卡车以及公交车。
例2：The pictures vividly reveal that heavy traffic is becoming increasingly serious all over the world。
译2：这幅图片生动地展示出全世界范围内的交通拥堵情况变得越来越严重。
2.excert adverse impact on environment对环境产生不良影响
例：Heavy transportation pressure in many cities may exert adverse impact on the environment。
译：许多城市的严重交通压力会对环境产生不良影响。
*excert (positive/negative/enormous) impact/influence on sth对……产生(好/不好/重大的)影响
3.modernization of automobile industry汽车工业的现代化
例：With the modernization of automobile industry and popularization of cars， transportation pressure and air pollution have been a major concern in urban life。
译：随着汽车工业的现代化进程以及汽车的普及，交通压力和空气污染已成为城市生活的主要问题。
4.automobile exhaust汽车尾气
例：Automobile exhaust has increased the burden of environment and is threatening people’s health at the same time。
译：汽车尾气加大了环境的负担，同时也在威胁着人们的健康。
5.biofuel生物燃料
例：Biofuel， a renewable form of energy， should be promoted by the government and automobile manufactors to alleviate the air pollution issue。
译：为了缓解空气污染问题，政府和机动车制造商应该推广生物燃料这种可再生能源。
6.commuting hours通勤时间(上下班时段)
例：More bus routes should be opened up during the commuting hours since bus can accommodate more passengers and relieve the pressure on the road。
译：公交车可以容纳更多的乘客并且缓解道路压力，因此在通勤时间应该开放更多的公交线路。
7.observe traffic regulation遵守交通规则
例：Both drivers and pedestrians should observe traffic regulations to avoid car accidents。
译：驾驶员和行人都应该遵守交通规则，避免车祸的发生。