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2024年5月8日 · Anne Applebaum. Holodomor, man-made famine that claimed millions of lives in the Soviet republic of Ukraine in 1932–33. Because the famine was so damaging, and because it was covered up by Soviet authorities, it has played a large role in Ukrainian public memory, particularly since Ukraine gained independence in 1991.
Eugène Freyssinet (born July 13, 1879, Objat, Fr.—died June 8, 1962, St. Martin-Vésubie) was a French civil engineer who successfully developed pre-stressed concrete— i.e., concrete beams or girders in which steel wire is embedded under tension, greatly strengthening the concrete member. Appointed bridge and highway engineer at Moulins in ...
racial segregation, the practice of restricting people to certain circumscribed areas of residence or to separate institutions (e.g., schools, churches) and facilities (parks, playgrounds, restaurants, restrooms) on the basis of race or alleged race. Racial segregation provides a means of maintaining the economic advantages and superior social ...
poliovirus. picornavirus, any of a group of viruses constituting the family Picornaviridae, a large group of the smallest known animal viruses, “pico” referring to small size and “rna” referring to its core of ribonucleic acid (RNA). This group includes enteroviruses, which attack the vertebrate intestinal tract and often invade the ...
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2024年5月8日 · Douglas MacArthur (born January 26, 1880, Little Rock, Arkansas, U.S.—died April 5, 1964, Washington, D.C.) was a U.S. general who commanded the Southwest Pacific Theatre in World War II, administered postwar Japan during the Allied occupation that followed, and led United Nations forces during the first nine months of the Korean War.
2 天前 · Pennsylvania, constituent state of the U.S., one of the original 13 American colonies. It is bounded to the north by Lake Erie and New York; to the east by New York and New Jersey; to the south by Delaware, Maryland, and West Virginia, and to the west by West Virginia and Ohio. Its capital is Harrisburg.
