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。

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The Montreal Protocol is the international agreement designed to protect the ozone layer by phasing out production of Cfc's and halons.

BBC: News | Sci/Tech | Ozone hole reaches record size

Scientists believe that ozone depletion in the atmosphere will continue until levels of ozone-destroying Cfc's drop to pre-1970 concentrations, around the middle of the next century.

BBC: News | Sci/Tech | Ozone hole reaches record size

Developing lightweight materials, such as low-cost carbon fiber composites (CFC's), that will improve fuel efficiency, performance, and corrosion resistance of the next generation of automobiles, aircraft, ships and trains.

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