Array ( [0] => Array ( [title] => L20A [link] => https://www.youtube.com/embed/TpN_kRkrTbA ) [1] => Array ( [title] => L20B [link] => https://www.youtube.com/embed/tDS1zGVx1hE ) [2] => Array ( [title] => [link] => ) ) 國立清華大學開放式課程OpenCourseWare(NTHU, OCW) - 第20講 The Special Nature of Carbon and the Characteristics of Organic Molecules