Because marijuana is a Schedule I substance (meaning that by definition it has "no currently accepted medical use and a high potential for abuse"), there are significant hurdles to getting the door unlocked.
由于大麻属于一类管制物质（意味着按照规定它“目前没有受认可的医用目的并具有很高滥用潜力”），为了打开这扇门仍需克服不少重要的障碍。