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。
It's called freon. It's also used in air conditioners.
这就是所谓的氟利昂,它也用于空调。
And so, by and large, until this freon was invented by Midgley, there wasn't a good gas that had the right properties to be used for a refrigerant.
因此,总的说来,直到Midgley发明氟利昂,没有一个气体,能被很好的用作制冷剂。
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