So it doesn't matter how big the dictionary is, you can instantaneously retrieve the value associated with the key. Extremely powerful.
因为你可以在线性时间,内得到想要的键对应的值,这太强大了。
How many bonding electrons does c l have? All right. Let's see, we've got a mixed response here, it turns out it has two bonding electrons.
氯有多少成键电子?好,让我们来看看,大家的回答不太一致,结果应该是两个成键电子。
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