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The origin of the idiom "rain check" can be traced back to the late 19th century in the United States. It originated from the practice of issuing tickets known as "rain checks" during baseball games.When a baseball game was rained out or postponed due to bad weather, spectators would receive a rain check ticket that allowed them to attend a future game instead. It is often employed when unforeseen circumstances arise, conflicting schedules occur, or when someone is unable to attend an event or engage in an activity as initially planned.

An exhibit is a public display of objects or works of art, often organized in a museum or gallery. It includes items such as paintings, sculptures, artifacts, or other collections for people to view and learn from. Exhibits can be temporary or permanent and are usually designed to educate and entertain the audience by providing information and visual experiences in an organized manner.

A pool is a contained area filled with water, designed for swimming, diving, or other water-based activities. It can be located outdoors or indoors and varies in size and shape, ranging from small residential pools to large public or competition pools. Pools are often divided into sections for different activities, such as lap swimming or leisure swimming. They are equipped with features like ladders, diving boards, and sometimes water slides. Pools are commonly used for exercise, relaxation, sports, or recreational fun.

A lobby is the entrance area or waiting space inside a building, usually near the front doors. It often serves as a transitional space between the outside and the rest of the building. Lobbies are commonly found in places like hotels, offices, and apartment buildings. They can be furnished with chairs, tables, and sometimes decorative features like plants or artwork. This area is used for receiving visitors, waiting, or accessing other rooms in the building, such as elevators or staircases.

A subway is an underground train system used for public transportation within cities. It is designed to carry large numbers of passengers quickly and efficiently, especially in busy urban areas. Subways usually have multiple stops along fixed routes, allowing people to travel between different parts of the city without being affected by surface traffic. These trains are typically faster than buses and can handle high volumes of passengers during rush hours. Subways are often a preferred mode of transport in cities with heavy traffic or limited road space.

A smartphone is a portable electronic device that combines the features of a cell phone with advanced computing capabilities. It allows users to make calls, send messages, browse the Internet, use apps, take photos and videos, and access various digital services. Smartphones typically include touchscreens, cameras, GPS, and wireless connectivity options like Wi-Fi and Bluetooth. They are powered by operating systems that support a wide range of applications, making them versatile tools for communication, entertainment, and productivity.