We cannot pay attention to read cache hit rate since we have been sequentially scanning a huge table over and over.
由于我们一遍又一遍地顺序扫描一个巨大的表,这样我们就无法关注读缓存命中率。
So let's turn our attention to a new topic, which is thinking a little bit about the periodic table, and also talking about periodic trends.
我们的新主题上,我们将会讨论一点关于元素周期表的知识,同时也会讲一讲周期性规律。
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