But that would be premature, Yeomans says.

但是，约曼斯说，这还为时过早。

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"They look at everything with the human eye," NASA's Yeomans says.

“一切都靠他们的肉眼观察，”美国航空航天局的约曼斯说。

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In Yeomans' mind, scientists have already demonstrated the best technique: ramming.

在约曼斯的心里，科学家们已经证明了最好的技术：撞击。

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Robert Charles Yeomans, former head teacher of St John's Primary School in Walsall, for services to education.

BBC: Adrian Lester

"No Earth impact is possible, " said asteroid expert Donald Yeomans at the Jet Propulsion Laboratory in Pasadena, Calif.

WSJ: Asteroid to Narrowly Miss Earth Next Week

Twenty years ago, no one would likely have discovered 2012 DA14, Yeomans said.

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