在第一次肾移植手术前，我已做了七年的透析。

I was on dialysis for seven years before my first transplant.

《柯林斯英汉双解大词典》

我在20世纪60年代初第一次认识了他。

I first made his acquaintance in the early 1960s.

《柯林斯英汉双解大词典》

在远处，我们突然第一次看到了太平洋。

In the distance we spied the Pacific for the first time.

《牛津词典》

So now, the enzyme is locked up with being built, and the penicillin has effectively killed the bacteria.

所以这是我第一次感受到,我想在单个原子的层面上思考这些分子,所以这时我的专业转到了化学方向。

麻省理工公开课 - 化学原理课程节选

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

I remember my first exposure way back in the 60s was a photo of the Biafra famine you remember in the civil war in Nigeria.

我记得我第一次感受到贫困，是在60年代,那是一张关于尼日利亚饥荒的照片,你应该记得，是尼日利亚内战期间。

普林斯顿公开课 - 人性课程节选