She couldn't pin him down to a date.
她未能迫使他确定下日期。
The cause of the disease is difficult to pin down precisely.
病因目前还难以解释清楚。
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。
I can only pin it down to between 1936 and 1942.
我只能将其确定在1936年到1942年之间。
He tried to pin me down, but I resisted.
他试图制伏我，但我奋力反抗。
It's difficult to pin her down to fixing a date for a meeting.
让她确定个开会日期实在是难。
I seem to recognize the quotation, but I cannot pin it down to its author.
这句引文我仿佛见过，但我不能确定它的作者是谁。
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。
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 is always hard to pin down.
但这始终是难以确切说明。
Culture is a difficult concept to pin down.
文化是一个非常难讲清楚的概念。
Other causes are harder to pin down.
其它原因就很难下定论了。
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。
No matter how you look at it, it's hard to pin these down.
不管怎么看，这些问题都是很难弄清楚的。
Hard as it is to pin that down, there's something to it.
尽管很难，但还是要那样子做一做。
Mr Obama's views are hard to pin down.
奥巴马先生的观点则很难确定。
Our soldiers know how to pin the enemies down.
我们的战士知道如何牵制敌人。
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 was difficult for me to pin down the subject.
对我来说，要弄清楚这个问题很困难。
At last we were able to pin the trouble down to a fault in the machine.
最后，我们终于找到了症结所在，是机器里面出了毛病。
But it took up to now to witness the process in action and pin down the mechanism.
但直到今天才能亲眼目击这一过程并阐明它的机制。
But expectations can be difficult to pin down.
但是预期是很难被阻止的。
It is difficult to pin down the exact meaning of this word.
很难确定这个词的确切含义。
Here you can see the simple pin I made to hold the back down.
在这里您可以看到简单的密码，我举行了回去。
Our soldiers know how to pin down the enemy.
我们的战士知道如何牵制敌人。
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 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。
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