Array ( [0] => Array ( [title] => L25A [link] => https://www.youtube.com/embed/ppLCIhAnxfI ) [1] => Array ( [title] => L25B [link] => https://www.youtube.com/embed/HxJ9nxLsGM8 ) [2] => Array ( [title] => L25C [link] => https://www.youtube.com/embed/OOQOvGDi_0w ) [3] => Array ( [title] => L25D [link] => https://www.youtube.com/embed/AzCFmDjYLXM ) ) 國立清華大學開放式課程OpenCourseWare(NTHU, OCW) - 第25R講 Trees