On his first day, he was very shy and only used simple words.

第一天，他很害羞，只用些简单的词语。

youdao

It was his first day in new school, and lunch was only thirty minutes away.

这是他在新学校的第一天，午餐时间只有30分钟。

youdao

Here's a story about his first day at my school.

这是一则关于它第一天在我学校的故事。

youdao

He says he invited his daughter and fifty of her friends to the studio on the first day of recording.

VOA: special.2009.06.05

But usually by 8 a.m., we'd have his first briefing of the day, which was always his intelligence briefing.

但通常到8点，我们就会开始第一个简报会议，通常是情报简报。

普林斯顿公开课 - 国际座谈会课程节选

His first term. Very first day.

是的，第一天开始工作。

普林斯顿公开课 - 国际座谈会课程节选

At Forbes, I hired one candidate who proved me right before his first day.

FORBES: What Startup CEOs Look For When Hiring

Mr. Siegel's consulting contract was terminated by May 1, his first day on the job.

WSJ: Menu

The police chief in nearby Nuevo Laredo was gunned down his first day on the job.

FORBES: The Crossing