/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.
我是在城市出生长大的一代。从我记事起，过年就难寻烟花爆竹声。老一辈常说年味变淡，对我而言，厚重的年味从来只在想象中存在。围炉是我为数不多的年味来源，如今这份年味也在变淡。
。搜狗输入法下载对此有专业解读
"It depends on the scale at which it happens," says Jackson of Capital Economics.
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Both of them expressed the importance of "getting out of [their] comfort zone", despite age.