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英文字典中文字典相关资料:


  • Encyclopedia Britannica | Britannica
    Explore the fact-checked online encyclopedia from Encyclopaedia Britannica with hundreds of thousands of objective articles, biographies, videos, and images from experts
  • Color | Definition, Perception, Types, Facts | Britannica
    Color, the aspect of any object that may be described in terms of hue, lightness, and saturation In physics, color is associated specifically with electromagnetic radiation of a certain range of wavelengths visible to the human eye Learn more about color in this article
  • Are Black and White Colors? | Britannica
    It depends on how you want to define color If color is solely the way physics describes it, the visible spectrum of light waves, then black and white are outcasts and don’t count as true, physical colors Colors like white and pink are not present in the spectrum because they are the result of our eyes’ mixing wavelengths of light
  • Jackie Robinson | Biography, Statistics, Number, Facts, Legacy . . .
    Jackie Robinson (1919–72) was the first Black baseball player to play in the American major leagues during the 20th century He famously broke the color line of Major League Baseball (MLB) when he appeared on the field for the Brooklyn Dodgers on April 15, 1947 A baseball icon, his jersey number, 42, was retired across MLB in 1997
  • Local colour | Definition, Examples History | Britannica
    Local colour, style of writing derived from the presentation of the features and peculiarities of a particular locality and its inhabitants Although the term local colour can be applied to any type of writing, it is used almost exclusively to describe a kind of American literature that in its
  • Colour - Visible Spectrum, Wavelengths, Hues | Britannica
    Colour - Visible Spectrum, Wavelengths, Hues: Newton demonstrated that colour is a quality of light To understand colour, therefore, it is necessary to know something about light As a form of electromagnetic radiation, light has properties in common with both waves and particles It can be thought of as a stream of minute energy packets radiated at varying frequencies in a wave motion Any
  • Purple | Color, Origin, Associations | Britannica
    Purple, a shade varying between crimson and violet The deep crimson colour was called in Latin purpura, from the name of a shellfish which yielded the famous Tyrian dye During many ages Tyrian purple was the most celebrated of all dye colors, and it was possibly the first to be permanently fixed on wool or linen
  • Fourteenth Amendment | Definition, Birthright Citizenship, Slavery . . .
    The Fourteenth Amendment, adopted in 1868, is an amendment to the U S Constitution that granted citizenship to “all persons born or naturalized in the United States ” Its immediate purpose was to grant citizenship and equal rights to formerly enslaved people, though its principle of birthright citizenship had broad implications that were contested in the 2020s
  • Yellow | Description, Etymology, Facts | Britannica
    Yellow, in physics, light in the wavelength range of 570–580 nanometers, which is in the middle of the visible spectrum In art, yellow is a color on the conventional wheel, located between orange and green and opposite violet, its complement Read more about yellow as a color
  • Red | Description, Etymology, Facts | Britannica
    Red, in physics, the longest wavelength of light discernible to the human eye It falls in the range of 620–750 nanometers in the visible spectrum In art, red is a color on the conventional wheel, located between violet and orange and opposite green, its complement





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