有困难的

Hard to extract Characters and accessible to light and accouterment are the main difficulties of Face Recognition ...

由于人脸是一种有弹性的局部可变形的非刚性目标，因而对面部特征的提取变得很困难，同时光照、饰物等干扰因素也增加了特征提取的难度，这是人脸识别技术存在的主要难题。。。。

Hard to extract Characters and accessible to light and accouterment are the main difficulties of Face Recognition technology.

由于人脸是一种有弹性的局部可变形的非刚性目标，因而对面部特征的提取变得很困难，同时光照、饰物等干扰因素也增加了特征提取的难度，这是人脸识别技术存在的主要难题。

Based on the work of the first part, we studied the possibility of allyl as a protection group in the synthesis of oligonucleotides consisting in some unstable nucleotide analogues, such as nueleoside carbonate and sulfite.

在寡核苷酸的类似物中，碳酸酯及亚硫酸酯在碱性条件下的不稳定性使其在合成上有一定的困难，这限制了对它们的性质作进一步的研究。

Plains and prairies are about expanse, a difficult concept to photograph.

平原和大草原的周围有宽广的区域，一个困难的概念对于照片。

We knew the hardest task would come in Q2 as after that, the car is always very competitive with a race fuel load on board: all the same, it was a pleasant surprise to see how it handled in the final part.

我们预计Q2会是最困难的，而之后，在加载了更多的燃油以后赛车通常会比较有竞争力。不管怎么说，排位赛最后冲刺时它的表现的确让我吃惊。

We have a new aviation environment - with new, private airlines, mostly well-positioned to survive in difficult conditions.

我们有一个新的航空环境---新的私营航空公司，大多是良好的定位，以便生存在困难的条件下。

It is, and I'm sure that all parents of teenagers or former teenagers can attest to this, a difficult period for all youngsters, hearing-impaired or not.

我相信所有的父母或曾经的青少年都可以证明，对于所有的青少年，不管有没有听力损害，这都是一个最困难的时期。

But without the threat of war or invasion, it is harder to identify. It requires leaders of stature to make a case to their electorates.

但在欧洲未面临战争或侵略威胁的情况下，要明确这一点比较困难——它要求有水平的领导人站出来，向他们的选民证明这一点。

Mime Lab understands the difficulties in steering towards the above direction and anticipates the obstacles in mixing various cultures in developing the "new art", but Mime Lab is determined to shoulder the mission of opening up a new horizon of Hong Kong's Mime and to work hard in popularising the art form with an aim to make it on par with that of the global development.

实验室明白坚持探索这个方向是艰辛的，要融合不同文化去拓展默剧有一定的困难，但并不会因此却步，反而会秉承着开拓「香港默剧」的精神，努力使「香港默剧」普及并与世界默剧同步。

Certainly,there will be so many difficulties in promoting reform in these monopoly industries.Only with the consensus of the centra...更多l government and the effective countermeasures will great achievement be made in reform in the monopoly industries.

当然，对垄断行业进行改革，还存在很多困难，但只要有中央的共识、坚定的决心以及强有力的措施，垄断行业的改革就有望取得进展。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。