Array ( [0] => Array ( [title] => L4A [link] => https://www.youtube.com/embed/-ZKaxhYPvI0 ) [1] => Array ( [title] => L4B [link] => https://www.youtube.com/embed/jbduetUmxV0 ) [2] => Array ( [title] => L4C [link] => https://www.youtube.com/embed/E784bmJQjvA ) [3] => Array ( [title] => L4D [link] => https://www.youtube.com/embed/vsClxOGm0TA ) ) 國立清華大學開放式課程OpenCourseWare(NTHU, OCW) - 第4講 Fourier series solution