So we're only looking at a snapshot of that very first moment in time.

VOA: standard.2010.06.30

First of all, it will only be a minute or two at a time, maybe once or twice a lecture.

首先，每次只有一两分钟，一堂课最多不超过两次。

哈佛公开课 - 幸福课课程节选

But it could be that we only grasp the forms in this life for the very first time.

但也可能是我们有生以来,第一次了解到形式。

耶鲁公开课 - 死亡课程节选

She both loved and respected Horne, who was the first African American to land a major Hollywood contract, at a time when blacks were cast only in subservient roles.

VOA: standard.2010.05.15

and went on to sell more than 100,000 copies of the song at a time when there were only about That song is regarded as the first-ever country music hit, and Loudon Wainwright performs it under the title "The Deal" on his Grammy-nominated CD.

VOA: standard.2010.01.24