I have to know exactly why it is I'm doing a particular job.

我必须确切地知道我为什么做某项工作。

《柯林斯英汉双解大词典》

I have to know about the Lakers.

我想知道湖人的消息。

youdao

One is that I have to know what they're not telling anybody.

其中之一我必须得知道的就是什么是他们不愿意告诉任何人的。

youdao

We have a question from China. Feng Tianqiang says "I want to know something about John Dewey."

VOA: special.2010.01.07

If I'm going to make insulin from this I have to know that I've got the introns spliced out correctly.

如果我要用这些来生成胰岛素,我就得知道是不是把内含子都准确剔除了

耶鲁公开课 - 生物医学工程探索课程节选

I know to be a judge, you can't just become a judge, you usually have to practice as a lawyer first.

就我所知，你不能一开始就成为法官，你必须先成为一名律师。

为了更美好的世界 - SpeakingMax英语口语达人

Before I start to write, I have to know one thing: So, I guess Beyonce was never actually part of this, eh?

FORBES: The Action Movie Blog Post

So I have to know: Are you fired up? (Applause.) Are you ready to go? (Applause.) Let me tell you, I am so fired up.

WHITEHOUSE: The White House

Most women who are good at networking are attracted to those we envy, not in the green kinda way, but in an I have to know more about you kinda way.

FORBES: Negotiating Career Envy, Business Jealousy and Networking Snarky-ness