The behavior impulsivity is the core characteristic in drug dependent individuals.

行为冲动性是药物依赖者的核心特征。

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Some people can become psychologically dependent especially if they are using the drug to deal with other problems in their life.

一些人(特别是当他们借用药物来面对生活中的其他问题时)会对其产生精神依赖。

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And he struggled with depression. Cobain became dependent on the powerful drug heroin.

VOA: special.2009.11.06

He became dependent on alcohol and the illegal drug,heroin.

VOA: special.2009.05.03

State Health Department records show that drug-dependent babies were hospitalized 55 times in 1999, a figure that increased to 672 in 2011.

NPR: Tenn. Hospital Treats Drug-Dependent Babies

Dreyzehner, a medical doctor who practiced both occupational and addiction medicine, ordered all medical centers in the state to report every case of drug-dependent newborns.

NPR: Tenn. Hospital Treats Drug-Dependent Babies

The state estimates that nearly 1, 200 drug-dependent babies have been born in Tennessee in 2010 and 2011, the last two years where data is available.

NPR: Tenn. Hospital Treats Drug-Dependent Babies