他们完全误解了他做这件事的原因。

They completely mistook his reasons for doing it.

youdao

老陈现在做这件事的原因是：当他还是个孩子时他也经常得不到家庭的疼爱。

The reason Mr. Chen was in the business of saving lives now was that as a boy he'd always gone unanswered.

youdao

关于这件事我有几点看法，这就是我写信给你的原因。

I have some comments to make in relation to this matter, and that's why I am writing to you.

youdao

We're actually going to do one more clicker question to get started with today, and as we do, I'll explain something we're going to be trying today, which is a little bit of a friendly competition in terms of answering the clicker questions correctly.

我们将在开始讲授今天的课程之前,再多做一个选择题，我先来说明一下做这件事的原因，这实际上是一个,回答选择题的小比赛。

麻省理工公开课 - 化学原理课程节选