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。
As a writer, I need to spend a lot of time observing people.
身为作家，我需要花许多时间观察人。
Late at night, we can confer the time by observing the three stars.
深夜，我们可以通过观察三星来推测时间。
Late at night, we can confer the time by observing the three stars.
深夜，我们可以通过观察三星来推测时间。
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