Array ( [0] => Array ( [title] => L19A [link] => https://www.youtube.com/embed/DeLdOLPPhcQ ) [1] => Array ( [title] => L19B [link] => https://www.youtube.com/embed/D3itIS7InUI ) [2] => Array ( [title] => L19C [link] => https://www.youtube.com/embed/9QD_73WB4xY ) [3] => Array ( [title] => L19D [link] => https://www.youtube.com/embed/cdPFoLRy-AU ) ) 國立清華大學開放式課程OpenCourseWare(NTHU, OCW) - 第19R講 8.4 Properties of the integral