当内存缓存区域满时，lru会首先删除最近最少使用的缓存数据。

When the memory cache region becomes full, LRU removes the least recently used cached data first.

youdao

这种内存管理模式使用4 K b缓冲区为基数，然后从中分配结构，并跟踪内存页使用情况，比如哪些内存页是满的，哪些页面没有完全使用，哪些页面为空。

This memory management scheme USES 4kb buffers as its base, but then allocates structures from within, keeping track of which pages are full, partially used, and empty.

youdao

日积月累，你的的手机短信会满，但是手机内存有限，所以你必须删除一些短信。

Tip of the day, your phone will be full of the messages after several days. But the capacity of the phone is limited, so you must delete some messages.

youdao