先呼吸一口新鲜空气，再把鼻子探入杯中闻它的香味，轻轻摇晃酒杯，再闻，对比前后的香味有何不同。
The second step: smelling The first breath of fresh air, and then probe into the nose cup smell its fragrance, gently shaking the glass, then smell, smell the difference before and after comparison.
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