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So, how many distinct, so again, we're talking about distinct kinetic energies, a spectrum for the element hafnium, 72 and I'll tell you here that it has a z of 72, so you don't have to spend two minutes searching your periodic table.
好，有多少分立的……还是一样，我们讨论的还是不同的动能，铪元素的光谱中出现，而且我来告诉大家铪的原子序数是，这样你就不用因为在元素周期表中找它,而花费两分钟的时间了。
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Let's say you've lost your keys and you're searching throughout your house.
假设你把钥匙给弄丢了，你正在满屋子地找钥匙。
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When you are searching a list to see whether it has an element, you don't randomly probe the list, hoping to find whether or not it's there.
当我们在一个数组中,寻找目标元素的时候,我们不会随机的调查数组来看。
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And you've been searching for an hour. You can't find them.
你已经找了一个小时了，你还是没找到。
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If you were searching for unique populations of cells within the bone marrow what tools would you use to look for them?
如果你要在骨髓中,找一组特定的细胞群,你用什么工具来找呢
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And that's like kind of hoping that the element you're searching for is the first in the list and the last in the list. Maybe.
也就是希望要找的元素,在数组的头部或者尾部,情况可能是这样的。
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You're searching three or four things, but nonetheless, you have to do that trade off.
你只是在三个或四个数据中进行查找，但是即使如此，你也必须做一些权衡。
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You're not searching a million things.
你不是在一百万个数据中进行查找。
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