Because there is no hard drive in many embedded systems based on Linux, the initrd also serves as the permanent root file system.
由于在很多基于Linux的嵌入式系统上没有硬盘，因此initrd也会作为这种系统上的永久根文件系统使用。
Methods Apicoectomy was performed immediately after the permanent root canal filling.
方法对慢性根尖瘘管进行常规根充后，即刻行根尖切除术。
Methods Apicoectomy was performed immediately after the permanent root canal filling.
方法对慢性根尖瘘管进行常规根充后，即刻行根尖切除术。
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