Language acquisition is a developmental process. Research on spontaneous processes of both children learning their mother tongue and adults learning a second language has shown that particular stages of acquisition can be discriminated. Initially, learner utterances can be accounted for in terms of a language system that is relatively simple. In studies on second language acquisition this learner system is called the Basic Variety (Klein and Perdue 1997).
The New York City Subway System (Building America: Then and Now)
Teeming with a population of 3.5 million at the end of the 19th century, the island of Manhattan couldn't meet the city's demand for rapid transit with its horse-drawn trolleys and elevated train lines. New York City needed a subway system. After four years of digging and diverting miles of utilities and tunneling under the Harlem River, the city's residents celebrated a new era in mass transit on October 27, 1904, with the opening of a nine-mile subway route.
Home Theater - This high-end consumer magazine celebrates the experience and technology of home theater. Every issue features unique system-oriented product reviews, comparative product face-offs, comprehensive buyers guides, dealer product locator listings and all the information necessary to create a new home theater system, or get the most out of an existing system.
Illustrated Guide to the Human Body: The Respiratory System
his book is a concise, illustrated guide to the anatomy, physiology, well-being, and disorders of the human respiratory system. It has been written and illustrated specially for students and laypeople interested in medicine, health, fitness, and first aid.
