Array ( [0] => Array ( [title] => L27A [link] => https://www.youtube.com/embed/uz1e6L40E8k ) [1] => Array ( [title] => L27B [link] => https://www.youtube.com/embed/NEl2VY61TTQ ) [2] => Array ( [title] => L27C [link] => https://www.youtube.com/embed/Zr0FOM9gxHw ) [3] => Array ( [title] => L27D [link] => https://www.youtube.com/embed/lrkPwIm1ZxA ) ) 國立清華大學開放式課程OpenCourseWare(NTHU, OCW) - 第27R講 10.1 The innor product spaces