¡´¼¼°èÀÇ Ã¶ÇСµ Flatland: A Romance of Many Dimensions
Edwin A. Abbott ÀúÀÚ°¡ ÁýÇÊÇÑ µî·ÏµÈ ÄÁÅÙÃ÷°¡ ¾ø½À´Ï´Ù.
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