In 1992, the British Journal of Addiction described three unusual cases of carrot dependence.

1992年，《不列颠上瘾周刊》描述了三期罕见的胡萝卜依赖症。

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Scientists do know that having a mental illness doesn’t just increase the chance of intermittent drug abuse; it also significantly raises the risk of outright dependence and addiction.

科学家们确信，精神疾病不仅会增加患者间歇滥用药物的机率，而且还会增加彻底依赖药物甚至上瘾的风险。

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To be sure, psychological addiction can exist in the absence of physical substance dependence — how else to explain compulsive gambling?

可以肯定的是，心理成瘾有其物质基础- - -否则嗜赌成瘾作何解释？

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This dependence turned into a debilitating addiction.

FORBES: New Geographer

"My entire energy plan will produce three times the oil savings that John McCain's ever could -- and what's more, it will actually decrease our dependence on oil while his will only grow our addiction further, " he said.

CNN: Obama slams McCain's energy policy

Ms Sandford said that if addiction to smoking was a mental, as well as a physiological, dependence then it was logical that anti-depressants could could play a role in helping smokers to quit.

BBC: Smoking