When the SSD receives this new command, it can add the blocks defined to its free list and no longer worry about moving them around as part of wear-leveling.
当 SSD 收到这个新命令后，它就可以将所定义的那些块添加到其释放列表，不会再担心这些块再成为损耗的一部分。
If there is no root or a pointer pointing to any part of the list then your data is lost in memory.
如果既没有根也没有指针指向链表，那么你的数据就丢失在内存中了。
Summarizing the effect of a single newline: no effect in general, but it ends a list item or indented part;
总结单一的新行的优点：对整体没有影响，但是结束了列表内容或者嵌套的部分；
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