People talk about the physical addiction to nicotine and the psychological addiction to nicotine.

人们谈论尼古丁的身体成瘾和尼古丁的心理成瘾。

Though it's a psychological addiction as opposed to a substance addiction, brain scans of these people actually show a similar impairment of regions that those with drug dependence have.

虽然这是心理成瘾而不是物质成瘾，但是扫描他们的大脑后发现，脑内损伤的区域和药物依赖者损伤的区域类似。

Though it’s a psychological addiction as opposed to a substance addiction, brain scans of these people actually show a similar impairment of regions that those with drug dependence have.

虽然这是一种心理成瘾而不是物质成瘾，但对这些人的脑部扫描实际上显示出与药物依赖者相似的区域损伤。