並前往https://9lib.co/document/zwvrkmm0-%EF%83%B2%EF%83%B2%EF%83%B2%EF%83%B2%EF%83%B2%EF%83%B2%EF%83%B2%E6%8F%90%E8%A6%81251%E7%AC%AC%E4%B8%80%E5%80%8B%E9%87%8D%E8%A6%81%E7%9A%84%E5%90%91%E9%87%8F%E5%AE%9A%E7%90%86%E6%95%A3%E5%BA%A6%E5%AE%9A%E7%90%86DivergenceTheorem.html