酒精和香烟就是两个例子。

Alcohol and cigarettes are two examples.

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新的研究更深入地研究了香烟和酒精之间的关系。

New research has looked more closely at the relationship between cigarettes and alcohol.

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新的研究更深入地研究了香烟和酒精之间的关系。

New research has looked more closely at the relationship between cigarettes and alcohol.

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