“这是我第一次做木筏，”我说道。

“It’s my first rafting trip,” I said.

youdao

这是我第一次做这种年度总结。

T his is my first time doing an annual review.

youdao

这是我第一次做这样的事，我感到很高兴！

It was the first time I had ever done anything like that and it felt great!

youdao

What I'd like to do--and this will be the first time I've the clicker thing in the class so let's try out this little quiz and see how it works.

我想要--这是我第一次,在课上使用表决器,所以我们先做个小测试看看效果如何

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

This is the first time I've ever done that before.

这是我第一次这么做。

I'm frustrated 实战 - SpeakingMax英语口语达人