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。
The cause of the disease is difficult to pin down precisely.
病因目前还难以解释清楚。
I can't pin down the solution.
我不能牵制的解决方案。
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。
He is a difficult man to pin down.
他是个不易就范的人。
Other causes are harder to pin down.
其它原因就很难下定论了。
They can't pin down what is optimal.
他们无法确定哪种才是最佳的情况。
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。
Our soldiers know how to pin down the enemy.
我们的战士知道如何牵制敌人。
But expectations can be difficult to pin down.
但是预期是很难被阻止的。
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。
You must pin down every quotation to its author.
你一定要确定每一个引文的作者是谁。
It was difficult for me to pin down the subject.
对我来说，要弄清楚这个问题很困难。
Try to pin down the exact quality of its sadness.
努力弄清楚它的确切的悲哀特点。
Try to pin down the exact quality of its sadness.
努力弄清楚它的悲哀的精确的性质。
But it is harder to pin down more subtle health effects.
但是限制对健康的影响多一点，难度就更大一点。
It is difficult to pin down the exact meaning of this word.
很难确定这个词的确切含义。
It is difficult to pin down the exact meaning of this verb.
很难确切解释这个动词的意思。
To pin down the size of an orbital, we take a contour surface.
为束缚住轨道的大小，我们取一等值面。
It is hard to pin down what has been causing honeybees to vanish.
很难确定是什么原因使蜜蜂突然消失。
The police tried to pin down the blame for the fire in the school.
警方设法弄清学校失火的责任。
The numbers are very difficult to pin down so early in the program.
在该项目中数据很难过早地下结论。
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。
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。
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