Obtaining observing time on one of the newer, more powerful 8-meter telescopes or on the HST was, and remains, more challenging.

对于获得更新更大的8米级望远镜或者哈勃太空望远镜的观测时间仍具有挑战性。

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And even if astronomers have some inkling that an explosion is imminent, they still must arrange observing time or frantically search for an available telescope in proper position.

即使天文学家们隐约地意识到爆炸即将来临，他们仍然必须安排观测时间，或者不得不去疯狂地搜寻处于合适观测位置的可利用望远镜。

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Finally, the celestial background at various observing time and places can be rendered using the modeling result.

最后利用星空背景建模的结果，绘制出了在不同观测时刻和不同观测地点所观测到的星空背景。

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Finally, the celestial background at various observing time and places can be rendered using the modeling result.

最后利用星空背景建模的结果，绘制出了在不同观测时刻和不同观测地点所观测到的星空背景。

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