The idea of printing out wikipedia was actually quite common eight or nine years ago. At that time, Wikipedia had already enjoyed a certain degree of popularity and recognition around the world. The total amount of content limited to a single language seemed to be able to be carried on paper. There are many Wikipedia mirrors here, which can be browsed online or downloaded as offline versions: welcome to kiwix server Wikipedia) If expressed in polar coordinates, its general mathematical expression is: where a and b are coefficients, r is the distance from the point on the spiral to the coordinate origin, and θ is the rotation angle. This is exactly an exponential function with the natural constant e as its base. Example.
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Zhihu, a high-quality Q&A community on the Chinese Internet and an original content platform where creators gather, was officially launched in January 2011 with the brand mission of "allowing people to better share knowledge, experience and insights, and find their own answers." Zhihu relies on seriousness and professionalism.
