尼克松任内最戏剧化的事件几乎完全发生在黑暗之中。

The most dramatic event of the Nixon presidency occurred in near obscurity.

youdao

如果所谈论的事情完全发生在过去，则用过去时态(有时也叫做未完成时态)，例如：I used to live in Seattle /我过去住在西雅图。

If you are talking about something that is completely in the past, you use the Past Tense (sometimes called the Imperfect), e.g.

youdao

萨姆完全出于主动，开始把那天夜里发生的事一一向我们说了出来。

Quite unprompted, Sam started telling us exactly what had happened that night.

《牛津词典》

And even though these things can come across-- can come apart slightly under certain scenarios, those details won't matter for what we're about to turn to.

即便这些东西-,在特定情况下不完全同时发生，这些细节不会干扰到我们将要探讨的问题。

耶鲁公开课 - 死亡课程节选

Now, you all know that we can make irreversible changes in proteins, you can denature them completely, that's what happens when you cook an egg for example.

现在你们都懂蛋白能够发生不可逆的改变,能够完全变性,比如在你煮鸡蛋的时候就是这样

耶鲁公开课 - 生物医学工程探索课程节选

Things started to change probably on the first day of class, but not entirely-- because there's shopping period and it's such a wonderful thing-- you shop for classes.

事情也许从开课第一天就发生变化，但没有完全不同-,因为这是购物期，妙不可言的阶段-,你们选择课程。

哈佛公开课 - 幸福课课程节选