/etc is also writable, but it’s managed a bit differently. OSTree uses a technique called “etc overlay” to handle modifications in /etc. When an update is applied, OSTree compares files in the new version with those in /etc and applies changes intelligently, preserving local modifications as much as possible.
本报北京2月27日电 （记者李昌禹）国务委员、国务院残疾人工作委员会主任谌贻琴27日到中国残疾人体育运动管理中心调研米兰冬残奥会备战工作，看望即将出征的中国体育代表团并作动员，勉励大家牢记习近平总书记嘱托，全力备战参赛，为祖国和人民赢得更大荣光。
，这一点在WPS官方版本下载中也有详细论述
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