词汇	背器官
释义	背器官医dorsal organ
随便看	self-administered fund self-administered pension self-administered plan self-administered questionnaire method self-administered reinforcer self-administereds Self administration self-administration self administration experiment self administrationof drug Self administration of drug self administration of psychoactive drugs self-administration of psychoactive drugs self-administration of villagers self-administration pension Self Administrations self-administrations self-admiration self-admirations self-admission self-admission system self-admit selfadmittance self admittance self-admittance