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5 天前 · The Great Pyramid of Giza [a] is the largest Egyptian pyramid. It served as the tomb of pharaoh Khufu, who ruled during the Fourth Dynasty of the Old Kingdom. Built c. 2600 BC, [3] over a period of about 27 years, [4] the pyramid is the oldest of the Seven Wonders of the Ancient World, and the only wonder that has remained largely intact.
2024年5月20日 · The Navier–Stokes equations ( / nævˈjeɪ stoʊks / nav-YAY STOHKS) are partial differential equations which describe the motion of viscous fluid substances. They were named after French engineer and physicist Claude-Louis Navier and the Irish physicist and mathematician George Gabriel Stokes. They were developed over several decades of ...
2 天前 · Herbert Clark Hoover (August 10, 1874 – October 20, 1964) was an American politician and humanitarian who served as the 31st president of the United States from 1929 to 1933. A member of the Republican Party, he held office during the onset of the Great Depression.
4 天前 · An action game, titled Attack on Titan: Humanity in Chains (進撃の巨人 ～反撃の翼～, Shingeki no Kyojin ~Hangeki no Tsubasa~, subtitle lit. "Wings of Counterattack"), was developed by Spike Chunsoft for the Nintendo 3DS and released in Japan on December 5, 2013, North America on May 12, 2015, and Europe on July 2, 2015.
5 天前 · Structure of a typical L-alpha-amino acid in the "neutral" form Amino acids are organic compounds that contain both amino and carboxylic acid functional groups.[1] Although over 500 amino acids exist in nature, by far the most important are the 22 α-amino acids incorporated into proteins.[2] Only these 22 appear in the genetic code of life.[3 ...
2 天前 · Renewable energy (or green energy) is energy from renewable natural resources that are replenished on a human timescale. Using renewable energy technologies helps with climate change mitigation, energy security, and also has some economic benefits. [1] .
2 天前 · Sustainability is a social goal for people to co-exist on Earth over a long time. Definitions of this term are disputed and have varied with literature, context, and time. [2] [1] Sustainability usually has three dimensions (or pillars): environmental, economic, and social. [1]
