以下为英语四级翻译参考答案：
北京新东方罗宇
公交车曾是中国人出行的主要交通工具。近年来，由于私家车数量不断增多，城市的交通问题越来越严重。许多城市为了鼓励更多人乘坐公交车出行，一直在努力改善公交车的服务质量。车辆的设施不断更新，车速也有了显著提高。然而，公交车的票价却依然相当低廉。现在，在大多数城市，许多当地老年市民都可以免费乘坐公交车。（148）
Buses used to be the main means of transportation for Chinese people。 In recent years， due to the continuous increase in the number of private cars， the traffic problems in cities have become more serious。 Many cities have been trying to improve the service quality of buses in order to encourage more people to travel by bus。 The facilities of the vehicles are constantly updated and the speed significantly improved， but the bus fare still remains quite low。 Now， in most cities， many local elderly citizens can take buses for free。 （91）
过去，乘飞机出行对大多数中国人来说是难以想象的。如今随着经济的发展和生活水平的提高，越来越多的中国人包括许多农民和外出务工人员都能乘坐飞机出行。他们可以乘飞机到达所有大城市，还有许多城市也在筹建机场。航空服务不断改进，而且经常会有特价机票。近年来，节假日期间选择乘飞机外出旅游的人不断增加。（145）
In the past， traveling by plane was unimaginable for most Chinese people。 With the economic development and the improved living standards， more Chinese people， including many farmers and migrant workers， afford to travel by air。 They can fly to all major cities， and many cities are also planning to build airports。 Aviation services are constantly improving and special fares are often available。 In recent years， there have been increasing numbers of people choosing to travel by air during holidays。 （79）
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