Array ( [0] => Array ( [title] => L24A [link] => https://www.youtube.com/embed/x7PiLHQcHrs ) [1] => Array ( [title] => L24B [link] => https://www.youtube.com/embed/TZCnuFjJ6BM ) ) 國立清華大學開放式課程OpenCourseWare(NTHU, OCW) - 第24R講 Reduced to repeated integrals (Conti.) 17.8 柱座標