gateway drug

基本解释

• 入门毒品，上钩毒品（诱使吸食者服用危险性更强的其他毒品）, “敲门砖”，引子。

同根派生

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英汉例句

• One college athlete recently called beer a gateway drug for young people.
  一名大学运动员最近把啤酒称作年轻人的诱导性毒品。

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英英字典

剑桥英英字典

• a drug whose use may make it more likely that someone uses other, more dangerous, drugs

• gateway drug剑桥字典
• gateway drug柯林斯字典