It has taken until now to pin down its exact location.

一直到现在才确定了它的准确位置。

He set out with an apparently simple aim: to pin down the precise meaning of the concept of "information".

他的出发点显然很简单：确定“信息”这个概念的确切含义。

Inspired by Halley's suggestion of a way to pin down the scale of the Solar System, teams of British and French astronomers set out on expeditions to places as diverse as India and Siberia.

受哈雷提出的确定太阳系大小的方法启发，英国和法国天文学家团队开始在印度和西伯利亚等地考察。

The cause of the disease is difficult to pin down precisely.

病因目前还难以解释清楚。

Mr Obama's views are hard to pin down.

奥巴马先生的观点则很难确定。

But it is always hard to pin down.

但这始终是难以确切说明。

Other causes are harder to pin down.

其它原因就很难下定论了。

I almost knocked the bowling pin down.

我几乎要把这堆保龄球瓶打倒了。

Culture is a difficult concept to pin down.

文化是一个非常难讲清楚的概念。

You must pin down every quotation to its author.

你一定要确定每一条引文的作者是谁。

A trader's intent is hard to pin down, however.

然而，交易商的意向是很难被抑制的。

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。

If his identity is hard to pin down, his fears and hopes are easier to read.

假如他的身份很难确定，那他的担心和希望还是更容易弄懂一些。

Knowing that there is a problem does not necessarily help to pin down what it is.

要知道仅仅解决一个问题并不能确切地说明问题的所在。

Given a matching index, a single index fetch will pin down the row to be retrieved.

给定一个匹配的索引，通过一个单独的取索引操作就可以得到要检索的行。

Wheatley and Looser set out to pin down the point at which a face starts to look alive.

惠特丽和露泽着手找出脸在哪个点看起来有生机。

Indeed, the very number of transgender people in the country and the state is hard to pin down.

的确，在整个国家或一个州内变性人的数字很难确定。

If you want to pin down a character that doesn't want to be found, you don't use a movie star.

要是想要诠释一个从未存在过的人物，就不要启用电影明星。

If they can pin down the relationship between age and rotation, a star's age will be much easier to measure.

如果他们能够确定星星年龄与转速之间的关系，星星的年龄测起来就简单的多了。

This is to pin down dark matter and dark energy-the 95% of the universe the Standard Model doesn't explain.

这场较量的目的是理解暗物质和暗能量——在宇宙中占95%却无法用标准模型解释。

The requirements are difficult to pin down, and significant challenges are often posed by legacy data sources.

需求很难查明，遗留数据源常常提出重大的挑战。

This exhibition promises not just to celebrate the work of an important artist, but to pin down an elusive figure.

这次的展览绝对不只是歌颂一位颇具影响力的艺术家的成就，更是要揭开他的神秘面纱，确立他的形象。

All carbon footprints are hard or impossible to pin down accurately, but the Internet is a particularly complex case.

所有的碳足迹都很难或者不太可能精确地算出来，对于互联网，情况更是复杂。

Pin down the most important events in red - those deadlines and meetings that you cannot miss under any circumstances.

把最重要的事情标记为红色——这些事情和会议在任何情况下都不能错过。

Some expect Apple and Microsoft to Sue Google. Yet this is unlikely, because the online giant will be hard to pin down.

有些人期待苹果和微软起诉谷歌，然而这是不太可能的事情，因为谷歌这个网络巨人是很难被扳倒的。

After all, being honest or dishonest involves a set of cognitive and social factors which may prove too complex to pin down.

毕竟诚实与不诚实所涉及的可能是太复杂而难以确定的一系列认知和社会因素。

For something so influential and intuitively appealing, it turns out that the Hawthorne effect is remarkably hard to pin down.

作为一个如此具有影响力以及从直觉上引人入胜的理论，“ Hawthorne ”效应却显得异常难以证实。

Previous research had determined that skin could absorb water, but couldn't pin down why it didn't fall apart when it expanded.

先前的研究断定皮肤能够吸收水分，但是未能找出皮肤膨胀后不会破裂的确切原因。