最接近距离 closest point of approach; closest-approach distance; cpa closestpoint of appr ..
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distance of closest approach 接近距离 ; 最接近距离
closest-approach distance
最接近的距离
以上为机器翻译结果，长、整句建议使用 人工翻译 。
It will make its closest approach to the Sun - at a distance of not much more than a million km from the Sun's surface - on 28 November.
BBC: Comet Ison caught on film by Deep Impact craft
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