简单来说，“我们不知道，”博伦说。

"The short answer is, we don't know," Bollen said.

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他听了一会儿，然后对博伦说“世贸中心遭撞机了。”

He listened a few moments, and then told Boren: "the World Trade Center has been hit."

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“对这个结果我们颇感震惊。”美国布卢明顿印第安纳大学计算社会科学家约翰·博伦说。

"We were pretty astonished that this actually worked," said computational social scientist Johan Bollen of Indiana University-Bloomington.

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