单词	concentration
释义	concentration noun con·​cen·​tra·​tion ˌkän(t)-sən-ˈtrā-shən  -ˌsen- 1 a : the act or process of concentrating : the state of being concentrated especially : direction of attention to a single object All that noise is disturbing my concentration. b : an academic major or area of focus within a major The student chose law as his concentration. 2 : a concentrated mass or thing a concentration of wealth in the merchant class 3 : the amount of a component in a given area or volume The ozone concentration in the lower stratosphere has declined. Synonyms absorption attention engrossment enthrallment immersion See all Synonyms & Antonyms Example Sentences All that noise is disturbing my concentration. The job required her full concentration. When you're tired it's easy to lose your concentration. There was a concentration on ethics within the agency. There is a concentration of wealth in the cities. He objects to the concentration of power in the hands of a few rich men. See More Recent Examples on the Web In Prince George's County, Maryland, where there's a high concentration of poverty, at least 8 percent of the public school district's teacher slots are vacant, more than twice as many as last year, according to the teachers union. Gabe Cohen, CNN, 31 Aug. 2022 Cook County is the largest concentration of American descendants of slaves left in America. Darcel Rockett, Chicago Tribune, 22 Aug. 2022 Noe-Hays said there is no necessary concentration of nutrients for urine to be used as fertilizer. Keely Larson, Ars Technica, 20 Aug. 2022 Up until now, the focus of festivals with regard to climate change has been extremely long-term, with a concentration on reducing energy use and waste and limiting an event’s carbon footprint. Scott Roxborough, The Hollywood Reporter, 29 Aug. 2022 Believed to shelter the largest concentration of petrified wood on the planet, Petrified Forest delivers scenic and scientific wonders in equal measures. Roger Naylor, The Arizona Republic, 22 Aug. 2022 In fact, Na+ is at a much higher concentration outside the membrane than inside. Gabriel A. Silva, Forbes, 18 Aug. 2022 The Dothan Area Chamber of Commerce said the new jobs at the Dothan facility will permit APS to enhance the focus on its medical product line, with a concentration on human and animal health markets. Paul Gattis | Pgattis@al.com, al, 9 Aug. 2022 Among its insights: • Even at the lowest concentration measurable in a lab, SARS-CoV-2 virus established a beachhead in the throats of just over half of the young, healthy subjects within two days. Melissa Healy, Los Angeles Times, 30 June 2022 See More Word History Etymology see concentrate entry 1 First Known Use 1606, in the meaning defined at sense 2 Phrases Containing concentration hyper-concentration concentration camp hyper-concentration concentration camp Kids Definition concentration noun con·​cen·​tra·​tion ˌkän-sən-ˈtrā-shən  1 : close attention to or thought about a subject There is a concentration on math in the curriculum. 2 : the ability to pay close attention I lost my concentration when an ambulance drove past. 3 : a large amount of something or a large number of people in one place Medical Definition concentration noun con·​cen·​tra·​tion ˌkän(t)-sən-ˈtrā-shən, -ˌsen-  1 : the act or action of concentrating: as a : a directing of the attention or of the mental faculties toward a single object b : an increasing of strength (as of a solute or a gas in a mixture) or a purifying by partial or total removal of diluents, solvents, admixed gases, extraneous material, or waste (as by evaporation or diffusion) 2 : a crude active principle of a vegetable especially for pharmaceutical use in the form of a powder or resin 3 : the relative content of a component (as dissolved or dispersed material) of a solution, mixture, or dispersion that may be expressed in percentage by weight or by volume, in parts per million, or in grams per liter concentration noun as in immersion a focusing of the mind on something the noise from the party next door threatened to disturb the law student's concentration Synonyms & Similar Words Relevance immersion attention absorption engrossment preoccupation obsession fixation awareness enthrallment consciousness alertness application intentness consideration meditation contemplation rumination raptness regard musing pondering heedfulness Antonyms & Near Antonyms inattention withdrawal absence abstraction detachment distraction indifference unconsciousness remoteness unawareness obliviousness disinterest mindlessness absentmindedness confusion bewilderment abstractedness unconcern bemusement befuddlement See More Phrases Containing concentration concentration camp concentration camp
随便看	carbon oxide carbon oxychloride carbon paper carbon pencil carbon process carbon silicide carbon spot carbon star carbon steel carbon suboxide carbon sulfochloride carbon tetrachloride carbon tissue carbon transfer carbon-date carbon-neutral carbon-nitrogen cycle carbona carbonaceous carbonade carbonades carbonado carbonadoed carbonadoes carbonadoing

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