Array ( [0] => Array ( [title] => L3A [link] => https://www.youtube.com/embed/BVGggysz53w ) [1] => Array ( [title] => L3B [link] => https://www.youtube.com/embed/REm_zRgpSiM ) [2] => Array ( [title] => L3C [link] => https://www.youtube.com/embed/XxUELEoZGko ) [3] => Array ( [title] => L3D [link] => https://www.youtube.com/embed/UvnmkiXsWxM ) ) 國立清華大學開放式課程OpenCourseWare(NTHU, OCW) - 第3R講 2.2 Interior of a set