L19_A
Example_star war VIII
Example_hexagonal & pentagon
L19_B
Combination with unlimited repetitions
Example_X+Y+Z<=11
Array ( [0] => Array ( [title] => L19A [link] => https://www.youtube.com/embed/Im5vNv9fIxQ ) [1] => Array ( [title] => L19B [link] => https://www.youtube.com/embed/2p4lyGcDiFI ) )
Title
第1節
第2節
Syllabus
L19_A
Example_star war VIII
Example_hexagonal & pentagon