"When we launched, the space age was only 20 years old, so we had no evidence that things last that long," added California Institute of Technology's Ed Stone, Voyager project scientist.

“当我们发射它时，太空时代才刚开始20年，所以我们没有证据表明它能飞这么久，”加州理工大学的旅行者号科学家Ed Stone补充道。

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The Voyager project scientist at Nasa's Jet Propulsion Laboratory, Ed Stone, said he wanted to see a reorientation of the magnetic fields around the probe before declaring it to be in interstellar space.

BBC: Voyager Solar System 'exit' debated