Current regulations mean that in 2015, developing countries will have to freeze their HCFC use at or below the level it is then, phasing out entirely by 2040.是什么意思_Current regulations mean that in 2015, developing countries will have to freeze their HCFC use at or below the level it is then, phasing out entirely by 2040.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句