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Excavations make it clear that Arbela was already occupied in the fourth millennium BCE, but it is extremely difficult to know more about the first two thousand years of its history, because the modern city lies on top of the ancient town, which makes excavation difficult..

发掘表明， Arbela已经被占领的公元前4千年，但它是极其困难更多地了解第一二千年的历史，因为现代城市位於上方的古镇，这使得开挖困难。。

And whole more attention in Chinese culture, the person ordering wants to satisfy the taste of different people, may be praised, also may be criticized, the archaism said:" it is difficult to cater for all tastes ", also know this is a difficult matter, can do it in this way, because think it is more important that the whole is unanimous.

而中国文化中更多的重视整体，点菜的人要满足不同人的口味，可能会受到赞扬，也可能会受到批评，古语有云："众口难调"，也知道这是件难事，可还要这样做，因为觉得整体的一致更重要。

It is difficult for most people to self promote and if you lack assertiveness, it is especially difficult.

对于多数人来说，自我推销都是一件困难的事情。尤其是你没什么自信的话。

Son of a woman bailiff hand偕老and son, it was so difficult, but because it is difficult and it has become more precious.

一个女人执子之手，与子偕老，竟然是如此的艰难，却又因这艰难而愈显珍贵。

Because the dead body had been stiff, so the whole process is very difficult, but can not be hard to complain, can we say "difficult" word, it is taboo.

因为逝者身体已经僵硬，所以在整个过程中是很艰辛的，可是再难也不能抱怨，不能说出"难"这个字，这是大忌。

Because the human metabolic process is extremely complicated, it is particularly difficult for the analysis of the biological sample of folic acid, the ordinary analysis method is difficult to detetmine it.

由于人体代谢过程极为复杂，叶酸生物样品的分析测定尤为困难，普通的测定方法难以对其进行检测。

In " do poineering work board administrative measure " roll out when, he is difficult in heart of attack by surprise excited,"Do achieve cast than raising ' the child ' difficult still."

在《创业板管理办法》推出之时，他难掩心中激动，"做创投比养一个 '孩子'还难。"

Although the start of the road is difficult, it is difficult, there are also risks, but I still break their election business, though many can not avoid the invisible pressures, financial difficulties may also be faced with failure, but I still To do so.

虽然，创业的道路是艰难的、是坎坷的，也蕴藏着风险，但我还是选折自己创业，也虽然，有许多避免不了的无形压力、经济困难，也可能会面临失败，但我仍然会坚持下去。

Cerium oxide has a wide range of uses, but many applications require special physics properties of particles. It is particle morphology, size, structure, dispersion, surface properties ,this physical and chemical properties, that determine their application field, but the traditional preparation process is difficult to control cerium oxide particle morphology and physical properties, thus making it difficult to meet the application requirements.

氧化铈有着广泛的用途，但很多方面的应用都要求其粒子具有特殊的物性，粒子的形貌、尺寸、结构、分散性、表面性能等物化性能决定其应用领域，但传统制备工艺难以控制氧化铈粒子的形貌及物性，从而难以满足应用的需求。

More Effective C This is a very difficult to find, like so clear pdf format but bookmark it is more difficult...

More Effective C++这是一本很难找到的书，像那么清晰的pdf格式的而且有书签的那就更是难找到了。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。