It has been celebrated for so long, but nobody exactly knows how it started.

人们已经庆祝它很久了，但没有人确切地知道它是如何开始的。

youdao

Did you see how it started?

看到比赛开始的情况了吗？

youdao

Food — Or At Least That’s How It Started

食物——或者至少问它是如何产生的

youdao

"I've always loved working with the robots. And when I first started it was a challenge working with the robots, understanding how they worked and figuring them out.

VOA: special.2010.07.28

Nothing wrong with that. That's just how it started, right?

这一点也没有错，这就是它的起源，对吧？

斯坦福公开课 - 戴尔CEO-Michael.Dell谈创业和发展课程节选

I was just reading his book right now about, you know, the rise of Facebook and how it all started.

我现在正在读他的书，关于社交网络的创建和兴起。

适合创业的旧金山 - SpeakingMax英语口语达人

Police said they were working with the fire service to establish exactly how it started.

BBC: Warehouse fire in Etruria 'was accidental'

Here's how it started: with a question from MSNBC moderator Tim Russert.

NPR: Clinton No Longer Unscathed Front-Runner

A. I have an idea how it started in the press.

CNN: Transcripts from video deposition of Sidney Blumenthal