这里面的b和s是什么意思啊？
D0001 B Record of Lodoss War I CHI / ENG Y 2
D0002 B The Vision of Escaflowne CHI / ENG Y 3
D0003 B Record of Lodoss War II CHI / ENG Y 3
D0004 S Blue Submarine No.6 CHI / ENG Y 1
D0005 S The Five Star Story CHI / ENG Y 1
D0006 S Ghost in the Shell CHI / ENG Y 1
D0007 B Evangelion Air + Death & Rebirth CHI / ENG
