natural radiation background — естественный радиационный фон
background monitoring station — станция для контроля фона
ultraviolet background — ультрафиолетовое излучение фона
cluttered background — фон помех от внешних предметов
anthropomorphic background — антропометрический фон
English-Russian big medical dictionary. 2005.
Background — The term background may refer to:In art: *Background (art), the part of a scene that appears to be farthest from the viewer *Background lighting, a film techniqueIn computing: *Background (computer software), software that is running but not… … Wikipedia
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Sky and Water I — Artwork title=Sky and Water I artist=M. C. Escher year=1938 type=woodcut height=43.5 width=43.9 Sky and Water I is a woodcut print by the Dutch artist M. C. Escher which was first printed in June 1938.The basis of this print is a regular division … Wikipedia
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