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1·Since varenicline is only a partial agonist—not a full agonist—at the alpha4beta2 receptor site, it performs differently in smokers and nonsmokers, she said.

对alpha4beta2受体来说，既然伐伦克林仅是部分激动剂--不是完全激动剂，它对吸烟者和非吸烟者的作用是不同的，她说。