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。
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。
There were 6 rats in every group at each observing time.
每组每个时间点的动物数为6只。
Rosiglitazone was put into the drinking water. The observing time was 8 weeks.
罗格列酮为观察药，溶于饮水中，实验期8周。
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。
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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