Array ( [0] => Array ( [title] => L17A [link] => https://www.youtube.com/embed/3L0OSDC7WLc ) [1] => Array ( [title] => L17B [link] => https://www.youtube.com/embed/wgBXiBS_AY4 ) [2] => Array ( [title] => L17C [link] => https://www.youtube.com/embed/DshjIilLkrQ ) [3] => Array ( [title] => L17D [link] => https://www.youtube.com/embed/qjGMON0yrJQ ) ) 國立清華大學開放式課程OpenCourseWare(NTHU, OCW) - 第17R講 根軌跡的特性