单元 7 - 7A - 第 1 部分

Traffic refers to the movement of vehicles and people along roads or streets. It involves cars, buses, bicycles, and pedestrians moving from one place to another. The flow of traffic can vary depending on the time of day, road conditions, and the number of vehicles or people. In busy areas, traffic can become slow, causing delays. Proper management of traffic helps ensure safety and smooth movement on roads.

An atlas is a collection of maps, usually in book form, that provides detailed information about different regions, countries, or the world. It includes various types of maps, such as political maps, physical maps, and thematic maps, which show different features like borders, landforms, and specific topics like climate or population. Atlases can also include other useful information like charts, graphs, and facts about the places shown in the maps. They are commonly used for reference, education, and travel planning.

A car is a type of automobile designed for personal transportation. It is powered by an engine, usually using gasoline or electricity, and typically has four wheels. Cars are commonly used for driving on roads and can carry passengers and sometimes small loads. They come in various shapes and sizes, such as sedans, hatchbacks, and SUVs, with different features like air conditioning, music systems, and safety equipment. Cars are essential for everyday travel, whether for commuting, errands, or long trips.

A cul-de-sac is a dead-end street or road that is designed with a circular or rounded turning area at the end, allowing vehicles to turn around easily. It is typically found in residential neighborhoods and is often quieter and safer than other streets due to the lack of passing traffic. Cul-de-sacs are popular in suburban areas because they provide more privacy for residents and reduce the amount of passing cars. The design of a cul-de-sac can also help in managing traffic flow within a neighborhood.

A crossroad is a place where two or more roads meet, forming a junction. It is a point where vehicles and pedestrians can travel in different directions, depending on their destination. Crossroads can be found in both rural and urban areas, and they may be controlled by traffic signals or signs. These areas are important for directing traffic and allowing movement between various routes. Depending on the location and traffic flow, crossroads may vary in complexity, from simple four-way stops to larger, more complicated intersections.

A side street is a smaller road that branches off from a main road or street. It is usually quieter and less busy than the main streets, providing access to residential areas, local businesses, or parking spaces. Side streets are typically narrower and can be more direct routes to certain locations, helping to reduce traffic on main roads. These streets are often lined with homes or smaller shops and are designed to support less traffic while still connecting to the larger road network.

A speed bump is a raised area on a road or street designed to slow down vehicles. It is typically made of asphalt, rubber, or concrete and is placed in areas where drivers need to reduce speed, such as near schools, parking lots, or residential neighborhoods. Speed bumps are shorter and more abrupt than speed humps, which are designed to slow traffic over a longer distance. They help improve safety by encouraging drivers to drive at lower speeds, reducing the risk of accidents and allowing pedestrians to cross more safely.