Avoiding cigarettes—and staying smoke free—could help balance your brain chemicals.

所以远离烟草并保持不吸烟的状态就可以帮助你平衡脑部化学成分。

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Keeping your circulatory system in working order, by, say, avoiding cigarettes and saturated fat, lessens the onslaught of age-related damage to the brain.

保持你循环系统的正常运转，比方说，避开香烟和饱和脂肪，减少与年龄有关的损害大脑的刺激。

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Finally, I encourage young people to focus on things they'd like to improve about themselves that they can potentially change (such as becoming a better student, musician or athlete) and try their best to be strong and healthy by eating a well-balanced nutritious diet, getting at least one hour of exercise daily, and avoiding harmful habits such as smoking cigarettes or using drugs.

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As with cigarettes, the pleasure then consists mainly of avoiding the pain of giving up.

ECONOMIST: The harm done