We want to get at the truth. Who killed him? And why?

我们想查明真相。谁杀了他？为什么？

《柯林斯英汉双解大词典》

The army has not yet proffered an explanation of how and why the accident happened.

军队还没有提供对该事故如何发生以及为什么发生的解释。

《柯林斯英汉双解大词典》

We're gonna talk about what happens and why.

我将要谈论发生了什么以及为什么。

youdao

People debate issues like industrial farming, the use of sweeteners and why today two out of three adults weigh too much.

VOA: special.2010.12.27

But why is it acting? Why specifically acting and why this weird comment at the end, "What could be prettier?"

为什么是表演，为什么是具体的表演，为什么,会有这么奇怪的评论，还能有更漂亮的事情吗“

耶鲁公开课 - 1945年后的美国小说课程节选

So, can you tell us about famous attractions in New York City and why they are famous?

那么，你能跟我们讲讲纽约著名的景点以及它们为什么有名吗？

纽约的景点 - SpeakingMax英语口语达人

Why should the government and why should President Bashir take U.S. threats seriously at this point?

NPR: U.S. Officials Look for Political Solution to Darfur

What had drawn me to my wandering life, and why was it so hard to relinquish?

BBC: The end of a wandering way of life?

And they explain why Europe is in trouble and why Illinois is in trouble.

FORBES: Illinois Downgrade Provides More Evidence that Higher Taxes Make Fiscal Problems Worse, not Better