So this looks like it's doing a little bit of extra work, but you can see, if you look at that how it cuts it down at each stage.
它就做了很多多余的工作,如果你认真看,你能看到每个阶段,它是如果缩减查找空间的,我要告诉你。
Let's say your friend is a really great worker and your boss comes to you and says,
假设你有个朋友工作认真负责。有一天你的老板找到你,跟你说,
So if you just did carelessly, you'd completely fail the president's day.
如果不认真安排日程,你可能就完全搞砸了总统的工作。
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