[das] [毒品]3,4亚甲二氧基甲基苯丙胺。亚甲基双氧甲基苯丙胺。摇头丸的主要成分。
MDMA(Ecstasy, 3-4 methylenedioxymethamphetamine)
N，a-二甲-3，4-甲烯二氧苯乙胺 N, Dimethy1-3, 4Methylenedioxyphenethyamine

The following video provides you with the correct English pronunciation of the word "3,4 Methylendioxymethylamphetamin", to help you become a better English speaker.