The annual mean levels of CFC-12 and CFC-11 in the Dinghu Mountain,a regional background site in PRD,were higher than those in global background stations,indicating that there were emission sources of CFC-12 and CFC-11 in PRD.是什么意思_The annual mean levels of CFC-12 and CFC-11 in the Dinghu Mountain,a regional background site in PRD,were higher than those in global background stations,indicating that there were emission sources of CFC-12 and CFC-11 in PRD.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句