英语词汇langley的起源、历史背景-英语词源词典

langley. In 1896 Samuel Pierpont Langley, already a celebrat- ed physician and astronomer, constructed and flew the first heavier-than-air model plane. This pilotless steam-driven model traveled a distance of 4,200 feet over the Potomac River and though it included no provision for takeoff or landing, convinced many aviation pioneers that powered mechanical flight was possible. The government appropriated $50,000 for the inventor to build a full-size craft, powered by a 50- horsepower gasoline engine, which failed in two 1903 test flights. This subjected Langley to great ridicule, but the fault was in the launching apparatus, and the plane was reconstruct- ed and flown successfully in 1914, seven years after Langley’s death. Samuel Pierpont Langley (1834–1906) had a rich and varied career in science. Langley Field in Virginia pays tribute to his pioneering aviation work, and his accomplishments in physics are honored by the word langley, a measurement unit of solar radiation.

词汇	langley
词源	langley. In 1896 Samuel Pierpont Langley, already a celebrat- ed physician and astronomer, constructed and flew the first heavier-than-air model plane. This pilotless steam-driven model traveled a distance of 4,200 feet over the Potomac River and though it included no provision for takeoff or landing, convinced many aviation pioneers that powered mechanical flight was possible. The government appropriated $50,000 for the inventor to build a full-size craft, powered by a 50- horsepower gasoline engine, which failed in two 1903 test flights. This subjected Langley to great ridicule, but the fault was in the launching apparatus, and the plane was reconstruct- ed and flown successfully in 1914, seven years after Langley’s death. Samuel Pierpont Langley (1834–1906) had a rich and varied career in science. Langley Field in Virginia pays tribute to his pioneering aviation work, and his accomplishments in physics are honored by the word langley, a measurement unit of solar radiation.
随便看	all the news that-s fit to print all the tea in china all the traffic will bear all the world-s a stage all things are difficult before they are easy all this for a song all thumbs all vines an’ no taters all washed up all wool and a yard wide all wool and no shoddy almanac almighty dollar almond aloha aloha oe aloha shirt aloha state aloof alpha and omega alphabet alphard and other star names alps al-qaeda alsatian