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

VOA: standard.2010.06.30

Remember, language exists synchronically: it only exists in a moment, in a moment of simultaneity.

注意，语言存在于同一时间中：,它只存在于一个个时间截面上。

耶鲁公开课 - 文学理论导论课程节选

In another example, you could explain what you're doing not only at a particular moment,

在下面一个例子中，你可以解释不仅仅在一个特定时间干的事情。

I'm ~ing 课堂 - SpeakingMax英语口语达人

Just imagine a philologist being confronted with the idea that the meaning of words at a certain historical moment isn't the only thing that matters in understanding the meaning of a poem.

想象一下，一个语言学家看到一个理论指出,一个字在特定历史阶段的语义,不是影响诗歌意思理解的,唯一因素。

耶鲁公开课 - 文学理论导论课程节选