Scott Perl, Albuquerque, N.M. A: Auto racers have told us the main advantage in filling tires with nitrogen instead of ambient air is that nitrogen tends to maintain more consistent tire pressure over a wide range of temperatures. As friction between the tire and pavement drives up the temperature, air with varying amounts of moisture content responds differently and can cause inconsistencies in tire pressure. While racing drivers are more likely to notice the advantages of nitrogen than everyday drivers, we haven't heard of any disadvantages to using it. Skeptics question the practice, noting that ambient air is about 80% nitrogen and that it expands and contracts at the same rate as pure nitrogen. A number of readers say there's no appreciable difference in how the tires will react if filled with nitrogen, especially in everyday use. Q: Is it safe to use cruise control in rain or on wet pavement? -- Scott Brake, Westminster, Calif. A: Car makers often warn that cruise control should be used only in light traffic on open roads and in good weather. There have been reports of accidents involving cruise control when the car lost traction -- or hydroplaned -- in slippery conditions. Some car makers warn that the steady throttle of cruise control -- like keeping one's foot on the gas -- could cause the wheels to spin when they hit a wet or icy patch of road. Car-company representatives say the cruise- control warnings reflect the fact that drivers should be particularly vigilant when conditions are less than ideal, and cruising along on what amounts to partial autopilot tends to lull some drivers into a false sense of security. Q: If an automobile manual suggests a certain weight oil (such as, 5W-30), would adding a quart of a different weight oil (say, 10W-40) between complete oil changes damage the car's engine? -- Gil Ehrenkranz, Potomac, Md. A: Probably not. But today's engines generally are more precisely engineered than those of 20 or 30 years ago. Many of us at some point have topped off our cars with whatever oil happened to be available without causing damage -- at least not that we know of. Auto makers, however, say modern engines can be more sensitive to a change in oil weight, and using the wrong oil, even in small amounts, can hurt an engine's performance and even cause harm. Q: What is a sequential manual transmission? How does it differ from an automatic or a standard manual transmission? -- Harry J. Jaffe, Germantown, Tenn. A: A sequential manual transmission is a gearbox that requires gear changes to be made in order (first to second to third), instead of having a shift pattern with a lever that allows the driver to skip gears. Motorcycles have used such transmissions for decades and racing cars began using them years ago because they allow quicker shifts. Shifting is usually done through levers, buttons or switches. The sequential transmissions advertised today -- mainly in high- performance cars such as Ferraris, Aston Martins and some BMWs -- are technically manual transmissions, except that the clutch and the gear changes are controlled electronically. The advantage is that gear changes can be made more quickly and precisely than a human shifting the old-fashioned way. Traditionalists say the downside is that they simply aren't as much fun to drive and require less driver skill. 意思:斯科特Perl,阿布奎基,N.M.答:汽车赛车已经告诉了我们的主要优势和氮气充填轮胎代替周围的空气是氮倾向于保持更一致的胎压在很大的温度范围内。作为之间的摩擦力的轮胎与路面驱动温度,空气和变化不定的含水量反应,会导致不一致的轮胎压力。虽然赛车驾驶员更容易注意到的优点优点长处的优势,我们比每天氮、磷、钾和还没有收到任何缺点,使用它。怀疑论者质疑的实践,指出空气是大约80%,氮、磷、钾和热胀冷缩速度一样纯氮。大量的读者表示没有欣赏不同的轮胎会如何回应如果充满了氮,尤其是在日常使用。问:它安全巡航控制在雨中或在潮湿的路面吗?斯科特制动、威斯敏斯特宫——。答:汽车制造商经常警告巡航控制应该只用在光路交通开放的好天气。据报道,事故的巡航控制时,车失去牵引力——或者hydroplaned——在滑的条件。一些汽车制造商发出警告,稳定的油门巡航控制——就像一脚的气体——可能导致车轮旋转时,他们打湿或冰的补丁的道路。Car-company代表说,克鲁斯-控制警告反映驾驶员应特别警惕时,条件是少于理想,独自徘徊在什么等于趋于平静一些局部自动驾驶产生了一种虚假的安全感。问:如果一个汽车手册显示有一定的重量油(例如,5W-30),将增加一夸脱的不同,10W-40油(重量)之间的完整的机油变化损害的汽车引擎?吉尔Ehrenkranz、波,——事宜。答:大概不会。但是今天的引擎通常是更精确的工程比20或30年前。我们中的很多人已经超过了我们的汽车和任何可用的石油发生不损坏,至少不是我们所知道的。汽车制造商,然而,现代的引擎,可以更敏感的改变时,油,使用错误的重量,即使在少量的油,能伤害一个引擎的性能,甚至造成伤害。问:什么是一个序列手操作的传动系统。它如何与一个自动或手动传输标准吗?Jaffe >,德国——哈利。答:一个序列机械式变速器齿轮箱,是需要改变是为了(第二次到第三个),而不是有一个工作模式与杆,让车手可以跳过齿轮。使用这种传输摩托车赛车的几十年就开始使用他们,因为他们允许更快年前。通常是通过转移杠杆,按钮或开关。今天的顺序传送——主要是在广告表现等车,阿斯顿·马丁和一些不佳,手动变速器宝马—技术,除了那个离合器和齿轮的变化是控制电子签名。好处是齿轮的变化,可以作出更快速、准确地比人类将传统的方式。传统说不利的是,他们根本不一样的乐趣来驱动,需要更少的司机的技能。还有一篇:Cars in AmericaCars are an important part of lifein the United States. The car made the UnitedStatesanationon wheels.Andit helped to make the United States what it is today.There are three main reasons why the car became so popular in the United States. First of all the country is a huge one and Americans like to move around in it. The cars provide the most comfortable and cheapest form of transportation.The second reason that cars are popular is the fact that the United States never really developed an efficient and inexpensive form of public transportation. Long-distance trains have never been as common in the United States as they are in other parts of the world. Nowadays there is a good system of air service provided by planes. But it is too expensive to be used frequently.The third reason is the most important one, though. The American spirit of independence is what really made cars popular. Americans don't like to wait for a bus, or a train or even a plane. They don't like to have to follow an exact timetable.And the freedom a car gives them is what Americans want most to have.The decrease of gas supplies has caused a big problem for Americans. But the answer will not be a bigger system of public transportation. The real solution will have to be a new kind of car, one that does not use so much gas.Car PollutionEach year there is an increasing number of cars on the roads as millions of new cars are produced. One out of six Americans works at making cars, driving trucks, building roads or filling up gas. Americans couldn't live without cars!Most Americans would find it hard to imagine life without a car. However, some have realized the serious problem of air pollution caused by cars. The polluted air becomes poisonous and dangerous to health.One way to get rid of the polluted air is to make a car without pollution. But to build a clean car is easier said than done. Progress in this field is slow.Another way is to replace car engines with something else. Inventors are now working on steam cars as well as electric cars. Many makers believe that it will take years to develop a practical model for us.To prevent the world from being polluted by cars, we have to make some changes in our lives. Americans, for example, have to cut down on the number of their total cars.They are encouraged to use bicycles, which are thought to help keep the air clean.But this change does not come easily. A large number of workers may find themselves without jobs if a car factory cioses down. Thus the problem of air pollution would become less important than that of unemployment. Although cars have led us to a better life, they have also brought us new problems.意思:美国的汽车汽车是美国生活的重要组成部分。汽车使得美国成为轮子上的国家,它也帮助美国成为现在的样子。汽车在美国如此盛行有三个主要原因。首先这个国家地域辽阔,而美国人喜欢在其间来回走动。汽车提供了最舒适最便宜的交通方式。汽车如此盛行的第二个原因是美国从未真正发展过有效廉价的公共交通这一事实。美国的长途火车从未像世界上其它地方那么普及。如今飞机提供了空中服务的良好体系。但是飞机太贵了,不能频繁使用。而第三个原因是最为重要的。美国人的独立精神是使得汽车盛行的真正原因。美国人不喜欢等公共汽车、火车甚至飞机。他们不喜欢必须遵循精确的时间表。汽车给予他们的自由正是美国人最想得到的。汽油供给的减少已经给美国人带来了巨大的问题。但答案不是发展更大型的公交体系。真正的解决方式必须是一种新型的汽车,那种不需要使用很多燃料的汽车。汽车污染上路的汽车数量逐年增长,同时,每年都会生产出几百万辆新车。在美国,每六个人中就有一个从事与汽车相关的工作:造车、开车、修路、加油等等。离开汽车,美国人无法生活!大部分美国人简直无法想象没有车的生活会是什么样子。但是一些人也已经意识到汽车造成的空气污染已成为严重的问题。被污染的空气具有毒性,并且危害健康。解决空气污染的方法之一就是制造无污染汽车。但是生产清洁汽车说来容易做来难。目前,这一领域的进展十分缓慢。另一个方法就是使用其他东西替代汽车发动机。发明家正在研制蒸汽汽车和电车。但是许多厂家认为我们可以使用的实用型汽车的诞生可能还需要几年时间。要想阻止全球化的汽车污染,我们需要对自己的生活方式做出适当的改变。例如,在美国,需要缩减汽车总量。鼓励人们使用有助空气清洁的自行车。但这种改变不能一蹴而就。一旦汽车工厂关闭,就会有大量工人失去工作。与失业相比,空气污染似乎就不再那么重要了。尽管汽车为我们带来了更加舒适的生活,同时,它也带来了新的问题。
On the improvement of the current status of urban bus transport Paper Keywords: organization; planning Abstract: Urban traffic system is the urban system is an important subsystem, the city depends on the survival and development of transport, the rapid development of urban traffic and promote development. The bus transport in urban traffic is an important part of the city, it should speed up the development of urban bus transport in order to promote the rapid development of cities. Passenger traffic from the city traffic can be classified as public transport and private transport system of the two. At present, China's urban public transport characteristics are: the city public transport lanes with low coverage and low levels due to management, and other vehicles occupied by frequent public transport bus lanes caused by the low operating efficiency. Urban road unreasonable, so that local public transportation system utilization rate. Aging of the city bus a high degree of scheduling and organization of the unreasonable. Should speed up the development of urban transport system, the full development of urban transportation convenient, fast, large capacity. Therefore the following aspects should be the improvement of the urban bus transportation available. 1 city bus transport lines Urban public transport routes should be in line the city's main traffic flow, public transport in cities should be divided into the main lines and feeder lines. The main line linking the main passenger terminal and transportation hub, more than millions of people in big cities, the focus on passenger traffic hub should be set up quickly direct public transport routes. Generally by means of surveys to obtain data on a straight-line access to integrated planning and overall planning should be coordinated with the City to carry out. The use of lanes, the best rationale for a dedicated lane so that other lane segregation, isolation can be used with dedicated lanes and is equipped with monitoring systems. 2 urban public traffic density lines Urban public transport motor vehicles are usually lines of planning density, in the city center 3 ~ 4km/km2, peri-urban areas of 2 ~ 2.5km/km2, the distance between the Route 600 ~ 1000m, walking no more than 4 ~ 6min appropriate, the Town urban bus to the length of line should be advised as to the length of 8 ~ 12km. Would cause long lines of passengers waiting a long time and bus time arrival rate of a series of drawbacks such as poor. 3 bus scheduling and organization Vehicle Scheduling optimization is to determine the normal and efficient public transport operation of the important factors. Changes based on passenger flow and the specific operating conditions and other regulations, various models of vehicles and road traffic organization, such as passenger flow during peak hours to focus on the trunk of the vehicle with high-capacity organizations Station or shuttle bus from the train, in the flow large and narrow streets, small turning radius and the flow concentration of the body block with short bus. In addition, they can employ intelligent management tool. For example: public transport vehicle automatic threshold control system (collectively referred to international AVMcautomatic vehicle monitoring system), it can dispatch room in between efficient information access, effective communication links between the two (GIS). The main vehicles used by the GPS scheduling, dynamic target tracking and data collection on traffic flow, GIS geographic information used in traffic management and visualization of dynamic traffic information display. In addition, you can use variable message board information, broadcasting, on-street public phone, public computer network terminal, which has been in the way of public transport users on the roadside, bus stations or bus stops and on the platform, access to real-time information on bus travel services. 4 Coordination of bus and taxi operations management Door-to-door taxi service for passengers with a higher level of public transport. Utilization rate of its high energy consumption and less than a bus, air pollution is serious, complete the volume occupied by units of time and space resources, such as road defects, it should be based on the level of urban development and the actual needs of the taxi industry to strengthen the management and operation management, so that the coordinated development of the bus. 5 vehicle technologies to improve China's passenger capacity by bus at a small (60-90 passenger), and medium-sized (90-130 passengers) and large articulated vehicles (130-180 passengers) should be based on actual passenger traffic to the deployment of appropriate models to resources to reduce the rate of empty vehicles. It shall also meet the passenger demand on the city bus traveling comfort and convenience of passengers getting on or off request. The development of an independent suspension type, dedicated low-floor bus chassis and city buses, so bus and channel height of the pedal in order to reduce the vehicle center of gravity high over the estate to the requirements of comfort. It should also be a timely replacement of vehicles, the general public the best service life of 5 to 6 years. Extended active duty bus noise, and exhaust, and mechanical failure more than a series of shortcomings, with the scientific and technological development, many countries have also developed a number of the outcome of the application of modern high-tech bus. For example: the invention of the next generation of Japan's "middle-distance inter-city bus transport system of unmanned." Germany developed a city with public passenger transport vehicles, new cars can be run along the fixed-line and the traditional advantages of the bus and tram combination. 6 Public Transport Priority Development Strategy Urban public transport as the road space point with the demand, low environmental pollution, energy consumption should be small, giving priority to the development of traffic, in addition to China's cities are mostly intensive, therefore, to public transport systems and other forms of secondary form of transport in our country the structure of urban passenger transport natural direction of development. Commonly used way of public transportation there are two types of priority: Set according to the actual situation dedicated bus lane or bus lane roads. Intersection of the first; junction bus priority measures on the main bus phase-specific, dedicated bus lane entrance, as well as other special bus priority measures in line with the movement. City bus transportation is the main urban transport system is to communicate all aspects of the social production of an important part of urban development is the decision an important foundation for the development of one, so to speed up the development of the city bus. 【【题目你可以翻译为论改善我国目前城市公共汽车交通现状,希望可以帮助你】】
3000-4000字?!我劝你还是先找到英文文献再来百度问翻译的事情吧,这不是一般的翻译量啊,一般的上班的或者在学校的学生哪有时间给你翻译啊?再说在百度上问到的免费翻译你觉得可信么?给你推荐一家专业的翻译公司吧,沈阳美东旭翻译公司,他们是来自美国的翻译公司,有15年翻译行业经验,拥有积累多年的术语库,并且如果你有需要的话,可以为你提供以英语为母语的专业外籍人士进行翻译和校对哦,希望能对你有帮助。
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