这已经不是你第一次意识到自己处于这种情形了。

It's not the first time that you've found yourself in this situation.

《柯林斯英汉双解大词典》

这不是警方第一次调查他是否有欺诈行为。

This is not the first time he has been investigated by the police for fraud.

《牛津词典》

然而，这并不是它第一次被发现。

It isn't, however, the first time it has ever been seen.

youdao

Now this isn't the first time that we have in Milton the representation of the turning of a person to marble.

这不是第一次,在弥尔顿的表述中把人向石头转换。

耶鲁公开课 - 弥尔顿课程节选

So realize you don't have to get it right the first time, but you have to listen and watch to what actually those problems are and that is one of the roles your teaching fellows play.

请认识到，并不是要你第一次就把事情搞对，但是你必须听听，看看,问题是到底什么，这也是你们的助教,扮演的一个角色。

哈佛公开课 - 计算机科学课程节选

that the actor playing Comus in this first and only performance in the seventeenth century was none other than our John Milton himself.

在17世纪,演员第一次也是唯一一次扮演Comus的,不是别人正是我们的弥尔顿。

耶鲁公开课 - 弥尔顿课程节选