Recertification ensures the CCIE credential remains a meaningful measure of technical expertise. CCIEs are required to pass one CCIE written exam every two years.是什么意思_Recertification ensures the CCIE credential remains a meaningful measure of technical expertise. CCIEs are required to pass one CCIE written exam every two years.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句