Lester: But can Aaron help us pin them down?

雷斯特：但艾伦可以帮我们找到这样的人吗？

youdao

There are many other chemotherapy agents and it's hard for us to pin them down as to which ones are going to have neurocognitive difficulties.

还有许多其他的化疗药物，而且我们很难确定哪种药物会引起神经认知困难。

youdao

But it has been difficult to pin down the exact relationships between them.

但要准确定义它们之间的关系还是有困难。

youdao

Because once you actually push people,to pin them down, what do you mean by it,you end up with something that's either just not true, or not interesting,or not necessary, or not particularly unique to death.

因为你一旦逼问他们这到底是什么含义，得到的东西既不会是真实的，也不会是必要和有趣的，也不会是对于死亡来说独特的。

耶鲁公开课 - 死亡课程节选

The app allows emergency managers, for example, to track geotagged tweets by particular hashtags, which can help them pin down the locations of particular problems based on tweeting.

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Torrents are scattered, diverse and hard to pin down, and that makes them incredibly hard to stop.

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Voters still cannot pin him down, and this makes them uneasy.

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