Array ( [0] => Array ( [title] => L9A [link] => https://www.youtube.com/embed/avfrIdLQUTs ) [1] => Array ( [title] => L9B [link] => https://www.youtube.com/embed/jUgO34pbG-8 ) [2] => Array ( [title] => L9C [link] => https://www.youtube.com/embed/ykI10PAl3-g ) ) 國立清華大學開放式課程OpenCourseWare(NTHU, OCW) - 第9R講 Regular Surface (cont.)