In fact, pathological gamblers appear to experience more physical withdrawal effects when attempting to stop their behaviour when compared directly with drug addicts.

事实上，与直接吸毒上瘾的人相比，病态赌徒在戒赌时会经历更多的身体反应。

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They may also begin to need to do more and more of the activity over time to feel the effects, and experience physical and psychological withdrawal symptoms if they can't do it.

他们也可能开始时需要在一段时间反复重复这种活动才能感觉它的效果，如果他们无法继续，就会出现戒毒那样身体上和心理上的综合反应。

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More than physical tolerance, an addiction develops physical and psychological dependence separate from the need to avoid the pain of withdrawal.

除生理上的耐受(药)性之外，上瘾会形成不同于逃避戒除痛苦需要的生理和心理上的依赖性。

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For instance, if a kid guzzles a few Monsters every afternoon to amp for football practice, he can experience physical withdrawal symptoms when he tries to stop after the season ends.

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They may also begin to need to do more and more of the activity over time to feel the effects, and experience physical and psychological withdrawal symptoms if they can't do it.

BBC: Why anything can be addictive