Attempts to identify New Guinean's hunter-gatherers face the well-known difficulty of defining what constitutes a hunter-gather group.

试图确定新几内亚的狩猎者和采集者面临着一个众所周知的难题：界定什么是狩猎者-采集者群体。

youdao

Pilots learn that when they face a life-defining challenge, they should not run from their fear. They should embrace it.

飞行员们会学习到，当他们面临千钧一发的时刻时，他们不该逃避他们的恐惧，而该迎向它。

youdao

We are in a defining moment where we either unite or face irrelevance, "he said."

我们正处于决定性时刻，我们要么团结一致，要么啥都不是。

youdao

So the filmmakers focused on the theme of defining oneself in the face of unexpected obstacles.

WSJ: 'Monsters University' Teaches Pixar About Prequels

They reflect the real difficulty that corporations face in defining meaningful action on sustainability.

ECONOMIST: The Opposition's closing statement

The other big challenge Zoellick will face is defining a mission for the bank in emerging markets.

FORBES: Washington Insider Zoellick Gets World Bank