But of course, like any immutable system, there are mutable parts (otherwise, we couldn’t create any configuration files). OSTree handles this with “overlays” (actually, we use OverlayFS) that allow a read-write filesystem to be layered on top of the immutable system. For example, the /etc and /var directories are writable, while the rest of the system is read-only.
值得注意的是，针对此前备受用户吐槽的「微信文件重复保存吃内存」问题，微信官方此次也借机作出了明确回应：
，这一点在heLLoword翻译官方下载中也有详细论述
The BBC's chief content officer Kate Phillips told staff the BBC took "full responsibility" for what happened, adding that another racial slur had been edited out of the broadcast.
You might feel some relief with a fully split keyboard if you find yourself tensing up at the shoulders as you type on a standard board. Putting some distance between your hands may allow your chest to stay more open, which for some is an easier position to maintain. You may also appreciate being able to place your mouse or trackpad between the two halves of the board to minimize the distance your cursor hand needs to travel.