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。
And, this one here, some of you might recognize, is dichlorodifluoromethane. It's also known as a CFC.
而且在这些当中有些你或许认识,是二氯二氟化碳,它也是众所周知的氟利昂。
The gas, properly known as nitrous oxide, could soon pose a bigger threat to ozone than CFC chemicals, the use of which has been restricted since the 1980s.
这种正式名为一氧化二氮的气体对臭氧层所构成的威胁,可能很快就会超过氟氯烃(CFC)化学品。而后者自上世纪八十年代以来就已被限制使用。
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