Marijuana use is considered as a gateway drug to harder drug abuse.
Many studies show that alcohol is a gateway drug, leading innocent users to other, heavier drug use.
Ramsey Campbell is my favourite horror novelist, and was in fact the gateway drug that led my 12-year-old self into the wider world of general horror.
In 2016, Heimlich described the candidate as the gateway drug to outright white nationalism.
英语词典包含67175条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。