那是我来到这所学校的第一天。

It was my first day as a newcomer to the school.

youdao

我的新年第一天很高兴。这是一个很好的开始，我将尽我最大的努力，使这幸福的最后一年。

My first day of New year was very happy. It was a good start, and I would try my best to make this happiness last for the whole year.

youdao

我的新年的第一天非常高兴。这是一个很好的开始，我会尽力让这幸福持续一整年。

My first day of New year was very happy. It was a good start, and I would try my best to make this happiness last for the whole year.

youdao

That is a description of what I did on the first day.

这就是对我第一天行程的描述

耶鲁公开课 - 基础物理课程节选

So, it's my first day out and I'm just getting the hang of it again.

所以，这是我第一天出来，想再找找感觉。

自由职业者的生活 - SpeakingMax英语口语达人