A team of researchers begins to investigate, collecting skin samples for instance, recording anything that could help them answer the crucial question: why?

一组研究人员开始调查，收集皮肤样本，记录任何可以帮助他们回答关键问题的东西：为什么？

The crucial question is, what did you want out of survival?

关键问题是，你想从生存中得到什么？

The crucial question is: why are commodity prices declining?

关键问题在于：物价为何下降？

It is also a crucial question for the fragile global economy.

对于脆弱的全球经济而言，这个问题同样关键。

Another crucial question is: How does the lily strike a light?

还有一个关键问题：火百合如何点火？