那是我第一次到唐人街参观。

That was my first visit to Chinatown.

youdao

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》

这次航行使他第一次体验到自由的滋味。

This voyage was his first taste of freedom.

《柯林斯英汉双解大词典》

I also want to note that the end of the material today, so this last topic here, that's the end of the material that's going to be on this first exam.

我还想告诉大家，今天这些内容结束的地方，这个最后的主题，也就是第一次考试,要考到的地方。

麻省理工公开课 - 化学原理课程节选

I was going to say when you first start doing this, even people who have been doing it for a long time still go off on ten-minute daydreams before realizing that their minds were wondering.

我本想说第一次尝试时，但即便是修行多年的人,也会走神十分钟之久,方才意识到自己刚做了白日梦。

普林斯顿公开课 - 人性课程节选

This is when it first occurs to her that the whole world is being organized around her: Nothing of the night's could touch her. Nothing did.

这是她第一次意识到,她周围的整个世界是被安排好的：,那一夜没有什么能够触动得了她，没有。

耶鲁公开课 - 1945年后的美国小说课程节选