While pinning down a definition has proven tricky, the general consensus is it's some means of information gathering.

虽然事实证明给好奇下定义很难，但大家普遍认为它是一种收集信息的手段。

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Pinning down exactly what it is that makesHan Han so famous can be difficult.

要搞清楚韩寒究竟为什么这么出名可能是困难的。

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Empirically, economists have long had trouble pinning down the wealth effect from housing.

从经验上看，经济学家们一直以来都难以说清楚房产财富效应。

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Never get so wrapped up in pinning down particulars that you kill the novel for yourself.

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But pinning down such dietary links is no easy task according to Dr Knight.

ECONOMIST: Disease

There are still tree limbs pinning down electrical lines and broken telephone poles.

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