...on states): 是这样一些问题状态S, 对于这些问题状态, 由根到S的那条路径确定了这个解空间中的一个元组 答案状态(answer states): 是这样的一些解状态S, 对于这些解状态而言, 由根到S的这条路径确定了这问题的一个解 静态树(static trees): 树结构与所要解决问...
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When he came to the United States, he was startled to hear people answer, “Everywhere” when he asked where they grew up.
他刚来美国时,当询问别人在哪里长大,别人的答复是"世界各地"时,他感到非常震惊.
One way to get a quick answer is to compare Brazilian states with countries.
快速得到答案的一种方式是将巴西各州与其他国家相比。
But to mark the tests, they have to use an answer key sent down from the States.
不过为了给测试判分,他们使用的是从美国发来的答案。
During the first half of the nineteenth century, leaders of the United States could find no answer to the question of slavery.
VOA: special.2009.03.26
What's interesting is when--around when I was born the answer in the United States was about half.
但有趣的是…在我出生的时候,会投给黑人的美国人只有一半。
And answer a listener question about the most literate cities in the United States .
VOA: special.2009.03.27
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