She became a prostitute in order to pay for her cocaine habit.

她为花钱过可卡因毒瘾而成了一名妓女。

《柯林斯英汉双解大词典》

Call it the chicken-and-egg debate of the addiction world: Cocaine addicts are known for being frenetic, but which came first, the behavior or the habit?

这是药物成瘾领域中所谓“鸡生蛋还是蛋生鸡的争论”：大家都知道可卡因成瘾者近乎发狂，但是行为和习惯到底哪一个先出现呢？

youdao

One of their patients is a young woman of no fixed address, with asthma and a crack-cocaine habit.

NEWYORKER: The Hot Spotters