Flu viruses, however, evolve so fast that this "immune memory" provides only partial protection.
然而，流感病毒进化如此之快，以致于这种“免疫记忆”只能提供部分保护。
The full green boxes mean the memory pools are allocated in full when the database is started. Otherwise, only partial amount of memory is allocated.
完整的绿色方框意味着，在数据库启动的时候，该内存池是完全分配的，否则，就只分配部分的内存。
The full green boxes in the figure below mean the memory pools are allocated in full when the database is started. Otherwise, only partial amounts of memory is allocated.
图中的完整绿色方框意味着，在数据库启动的时候，该内存池是完全分配的，否则，就只分配部分的内存。
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