N-COUNT 入门毒品，诱导性毒品（如大麻，一些人认为此类毒品可诱人吸食更为有害的毒品） A gateway drug is a drug such as cannabis that is believed by some people to lead to the use of more harmful drugs such as heroin or cocaine. 入门毒品，诱导性毒品（如大麻，一些人认为此类毒品可诱人吸食更为有害的毒品）