The cycle of quitting the addictive behavior, going through withdrawal, and relapsing may become self-reinforcing.
对成瘾行为的戒除要经过戒除和复发的循环，最终形成自我强化机制。
2
The global average withdrawal of fresh water was 9% of the amount that flowed through the world's hydrologic cycle. Both Latin America and Africa used less than 6% (see table).