What's the population of Wshington D.C.Washingtong D.C.,华盛顿哥伦比亚区的人口是什么呀呀呀呀?

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What's the population of Wshington D.C.Washingtong D.C.,华盛顿哥伦比亚区的人口是什么呀呀呀呀?

What's the population of Wshington D.C.Washingtong D.C.,华盛顿哥伦比亚区的人口是什么呀呀呀呀?
What's the population of Wshington D.C.
Washingtong D.C.,华盛顿哥伦比亚区的人口是什么呀呀呀呀?

What's the population of Wshington D.C.Washingtong D.C.,华盛顿哥伦比亚区的人口是什么呀呀呀呀?
It has a population of more than 600,000.