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。
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。
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。
Gradually, keep up the pace you want, and I felt the pain has been difficult to grasp.
渐渐地，赶不上想要的脚步，我痛苦地感到已经很难把握。
Chromosome identification by traditional banding technique has been difficult in oysters.
传统的带型技术很难鉴定牡蛎的染色体。
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。
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。
We also acknowledge that it has been difficult for newspapers to make money from their online content.
我们也承认，要报纸从它们的网络内容中赚钱是困难的。
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。
If living in the major city, that must be watched at all times when go outside, it has been difficult for him.
如果生活在大城市，走在外面时必须时刻看着时间，这对他来说太难了。
Has been difficult to trace the exact origin of magic, perhaps with the introduction of human beings have a magic.
魔术的确切起源已经无从考证，也许自从有了人类就有了魔术。
The aging shuttle fleet has been fraught with so many problem that it has been difficult to get a successful launch of late.
老化的航天飞机一直存在着许多问题所以最近已经很难成功发射。
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。”
The mission in Iraq has been difficult and trying for our nation. But it is in the vital interest of the United States that we succeed.
对我们的国家而言，在伊拉克承担的使命是困难而艰巨的，但取得成功对美国的利益至关重要。
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。
Copyright Law of China listed manner defined by the scope of fair use, but this criterion has been difficult to apply in the digital environment.
我国著作权法采用列举方式明确规定合理使用的范围，在数字环境下，这一判断标准已很难适用。
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。
News on this hot topic has been difficult to report, as many original sources are difficult or impossible for tech bloggers with limited resources to translate.
跟这个热门话题相关的报道很难进行，因为科技博客作者的资源有限，很多原始资料很难或无法翻译。
It has been difficult to estimate the possible wave heights of any tsunami - the waves may not arrive at all or could be as high as 10 metres above normal sea level.
海啸可能达到的波高向来很难估计-海浪可能根本无法到达，或者可高达超出海平面10米。
It has been difficult to estimate the possible wave heights of any tsunami - the waves may not arrive at all or could be as high as 10 metres above normal sea level.
海啸可能达到的波高向来很难估计-海浪可能根本无法到达，或者可高达超出海平面10米。
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