Mary complains that it has been difficult to find experienced candidates.
玛丽抱怨很难找到有经验的候选人。
Reducing demand has been difficult.
事实证明，降低需求非常困难。
It has been difficult to gauge the human impact of the accident.
这次事故对人类的影响难以估量。
An answer to the first of these has been difficult to obtain.
关于第一问题的答案是很难获得的。
Creating reliable tests for these illegal compounds has been difficult.
对这些非法的化合物进行可靠的检测一直以来都是困难的。
But spokeswoman Claire Hassett said examining the damage has been difficult.
但公司发言人克莱尔·哈西特(ClaireHassett)表示，现在调查由此带来的损失非常困难。
But they insist that is not the case and the decision has been difficult.
但是她们坚称，不是这么一回事，这是个艰难的选择。
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。
Even in newer thin-film technologies, high-volume production has been difficult.
即使现在使用新型薄膜技术，大批量生产仍然是件难事。
That requires industry-wide cooperation, which has been difficult to achieve.
这要求整个行业进行协作，但通常很难办到。
And until recently, it has been difficult to model that complexity in the laboratory.
直到最近，这种复杂的关系还难以在实验室中模拟出来。
That story made bad publicity for us and, frankly, it has been difficult for us since.
这事大家都知道了，坦白说，从那以后，比赛对我们来说很困难。
Our galaxy's core is a frenzied place, and identifying baby stars there has been difficult.
银心是一个混乱的区域，从中辨识出早期恒星很难。
Hitherto, it has been difficult to find the truth against the background of false information.
至今为止，一直以来在充满错误信息的局面中很难发现真相。
Needless to say, continuing to do her research while battling bipolar disorder has been difficult.
不必说，和躁郁症斗争同时继续她的研究一直很艰难。
However, seeing the changes that are made in the portal configuration has been difficult up until recently.
不过，到目前为止，查看在门户配置中进行的更改非常困难。
In the past, it has been difficult for consumers to find the right samples and good versions of samples.
过去，使用者难以找到正确的示例和优秀的示例版本。
Reports say the site of the crash has been difficult for emergency workers to reach because of heavy snow.
报道称，由于大雪的缘故，紧急救援人员难以到达坠机现场。
Testing this theory has been difficult, however, because no supernova has gone off in our galaxy since 1680.
但是，要验证这项理论却非常困难，因为自1680年起银河系内就不曾发生超新星爆发事件。
Huntington says the idea of quantum teleportation has been around for about ten years, but has been difficult to put into practice.
亨廷顿说，量子传送的想法已经产生接近十年了，但很难述诸于现实。 她说，“曾有两种实现传送的方法，但都有其局限性。”
But Faust and other experts said they still need scientific data, which has been difficult to come by with so few monitoring programs in place.
但是Faust和其他的专家也表示他们需要科学数据的支持。考虑到目前的检测程序这么少，所以这些数据很难取得。
But proving this has been difficult because snatching a sample of the Mona Lisa's face for chemical analysis is, unsurprisingly, frowned upon.
但要证明这一观点则十分困难，因为要刮下一小块蒙娜丽莎的脸作为化学分析样本是无论如何都不可能得到允许的。
And we know that there have been times when the frequencies have been of such a strong nature that the balance has been difficult at times to hold.
我们知道有一段时间频率非常强烈自然，以至于很难保持平衡。
Dec:It has been difficult to maintain any regular contact with most of them as our lives are different, but occasionally I come across some of them.
跟以前很多人保持联系是很困难的，因为我们现在有不同的生活。但是偶尔我会遇到他们一些人。
Dec:It has been difficult to maintain any regular contact with most of them as our lives are different, but occasionally I come across some of them.
跟以前很多人保持联系是很困难的，因为我们现在有不同的生活。但是偶尔我会遇到他们一些人。
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