Array ( [0] => Array ( [title] => L4A [link] => https://www.youtube.com/embed/GXgdMv5e_c8 ) [1] => Array ( [title] => L4B [link] => https://www.youtube.com/embed/b8HTh5-NIDo ) [2] => Array ( [title] => L4C [link] => https://www.youtube.com/embed/o3IIdvDD5uc ) ) 國立清華大學開放式課程OpenCourseWare(NTHU, OCW) - 第4講 Logic puzzles_Heaven or hell_1 people version