“更替”的拼音？

“更替”的英语可以翻译为：eplace，supersedure，take turns，substitute，subrogation ...

肺细胞约每周新老更替一次。Lung cells die and are replaced about once a week.昼夜更替.Day and night alternate.从事高等教育的人员新老更替极其缓慢。There has been very little renewal of personnel in higher education....