Stage 1 is usually considered pleasant, and many people enjoy and become addicted to it.

第一阶段第一阶段是令人愉快的，很多的人喜欢并沉迷于这样的感觉。

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Emerging evidence suggests that drug abuse can be a developmental brain disorder, and that people who become addicted are wired differently from those who do not.

新出现的证据表明，滥用药物可能是进化过程中固有的一种大脑功能紊乱，而且，上瘾者兴奋的原因与正常人存在差异。

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LAWSON: in this era of computers and online networking, some people who play together become addicted to human contact.

劳森：在这个计算机和网络的时代，一些在一起玩的人却会迷上人与人之间的交际。

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On Twitter, they start out fatigued, and then become addicted.

FORBES: Facebook's MySpace Moment: Why Twitter Is Already Bigger Than Facebook

Markets and economies have seemingly become addicted to bailouts and are completely resistant to the idea of short-term pain or failure in the name of more productive and healthier long-term economic growth.

FORBES: The Bailout Mentality -- The REAL "New Normal"

Communities of graying gamers have sprouted up world-wide as generations reared on Pong and Pac-Man have become addicted to the latest iterations of Halo and Call of Duty, but are no longer as fast with their trigger fingers.

WSJ: These Videogame Sites Are for 'Mature' Audiences Only