2. Consequently, a black market in imported illicit CFC's has grown. 因此,非法进口氯氟化碳的黑市已经扩大。
3. Unfortunately, the cheap alternatives are even more harmful than the illicit drugs they replace. 不幸的是,这些廉价的替代品比它们所替代的非法药物更有害。
4. The boomerang effect has also played a role in attempts to reduce the availability of illicit drugs. 反向效应也在试图减少非法药物的供应方面发挥了作用。
5. In fact, the United States Customs Service reports that CFC-12 is a contraband problem second only to illicit drugs. 事实上,美国海关报告说,CFC-12 是仅次于违禁药物的第二大违禁品。