求翻译：So where does this leave the tens of millions of us with Freon-based, R22 systems? The short answer is that the Freon phaseout is stretched so far into the future that nearly all of today's air conditioners will have been replaced by then. The EPA will require a substantial reduction by 2004, and all products containing R22 must stop production by 2010. The production of R22 itself must cease by 2020. For those few R22 units still in service at that time, recycled R22 will be available, though it will probably cost a small fortune.是什么意思？

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