網址: https://images.idgesg.net/images/article/2019/02/letter_r_programming_language_wired_alphabet_light_board_by_vrender_gettyimages_plus_circles_halftone_by_shuoshu_gettyimages_2400x1600-100789393-large.jpg
網址2: https://www.infoworld.com/article/3565552/r-language-rises-with-covid-19-research.html
