单词	gray literature
释义	gray literature noun : written material (such as a report) that is not published commercially or is not generally accessible Example Sentences Recent Examples on the Web There is no gray literature now: Everything is a magnet for immediate attention and misunderstanding. James Heathers, The Atlantic, 23 Oct. 2021 Word History First Known Use 1975, in the meaning defined above
随便看	Catherine II catherine of bra Catherine of Braganza Catherine wheel Catherine, Mount catherines catheter catheterisation catheterisations catheterise catheterised catheterises catheterising catheterization catheterizations catheterize catheterized catheterizes catheterizing catheters cathetometer cathetometers cathetometric cathetuses cathexes

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