gateway drug

基本解释

• 入門毒品，上鉤毒品（誘使吸食者服用危險性更強的其他毒品）, “敲門甎”，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.
  一名大學運動員最近把啤酒稱作年輕人的誘導性毒品。

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英英字典

劍橋英英字典

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

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• gateway drug柯林斯字典