难得到的

The mechanism of lock corridor crack is rather complicated due to the unique structure of corridor. As a result construction technique improvement cannot totally eliminate corridor crack occurrence. According to the construction process and results of Jinghang Cannel Huaiyin 3rd Lock,certain technical measures and improvements in construction techniques,can efficiently control the corridor crack and avoid the occurrence of crack as much as possible.

船闸廊道裂缝的产生机理较为复杂，由于廊道独特的结构形式，仅仅从改善施工工艺方面来完全消除廊道裂缝的出现是很难的，从本次京杭运河淮阴三线船闸工程实施过程及结果来看，通过一定的技术措施和改善施工工艺，可使廊道裂缝得到有效的控制，同时避免了有害裂缝的产生。

In these cases it is hard to conceive of any explanation other than infidelity on the part of the woman—a hypothesis supported by the observation that female-positive discordancy is more common in polygamous marriages, where a wife is competing for attention from her husband, than in monogamous ones.

那么，除了不贞之外很难想象任何其他理由来解释这些地区由女性导致的不一致关系率。一个现象的观察资料可以支持这个假设，女性主导的不一致关系在一夫多妻的婚姻里发生的概率高于一夫一妻的婚姻，在这种婚姻里，女性需要通过竞争才能得到丈夫的关注。

There is a whole variety of products for all tastes: from the "bougnette"(small ground meat balls with a subtle hazelnut flavour) to the famous pig "fricandeau" aromatized with thyme and bay-tree.

从煎饼，肉馅小丸子到榛子的清香，以及著名的用百里香或月桂为香料，炭火烤嵌猪肉的小牛肉片，美食扎堆的洛泽尔，再挑剔的嘴巴都能得到满足，众口不再难调。

Classic technique is the Newton-Raphson iterative. But when the system grows much bigger, the computing is much more hugeness. And it is very difficult to get the result in a short time under the current hardware and software situation.

经典的潮流计算方法是采用牛顿拉夫逊法迭代计算，但是随着电力系统的规模的增大，计算量异常庞大，在现有的软硬件的很难在短时间内得到潮流计算的解。

Induction heating furnace is a complex delay system.Exact mathematical model is not easy to be established.

感应加热炉是一个复杂的非线性大滞后系统，很难建立一个精确的数学模型，用常规的控制方法难以得到满意的效果，而且人工调试比较困难，在扰动比较大的时候，就会远离设定值。

To the accuracy and the interpretability of fuzzy model in complex systems modeling, a novel modeling method is presented by combining the characteristics of PNC2 clustering with the genetic algorithm.

针对在复杂系统的模糊建模中，模型的精确度和可解释性很难同时得到满足的问题，利用PNC2聚类算法和遗传算法各自的特点，提出了一种新的建模方法。

As a result of the element of Chongqing situation, till today, local shoemaking enterprise still is versed in with the hand mill is given priority to, because this goes up to get assuring steadily hard in quality, more important is long-term go down before, the industry forms his relatively stable industry worker very hard, on the disorder that can cause management to go up from this and quality hard monitoring.

由于重庆地理位置的因素，直到今天，当地制鞋企业还以手工作坊为主，因此在质量上难以得到稳定的保证，更重要的是长期以往下去，企业很难形成自己相对稳定的产业工人，由此会导致治理上的混乱和质量上难以监控。

It seems that Japanese students tend to have difficulty in sound pitch of sentence stress.

但是，那些问题之所以难易得到解决是因为"学"的方面存在些问题；而"学"的问题又和"教"的问题有直接的关系。1.3 日本学生的汉语句重音掌握情况小结2。

Although the measures such as the simulation method with detailed generator model in which the dynamic behavior of exciting system is taken into account and installing power system stabilizers in main generators of Northeast Power Grid were adopted, it was still unable to effectively verify the reasonableness of parameter setting of PSS as well as its integrated matching result, and there was not enough scientific foundation for the selection of power grid model, especially load models. Moreover, it was hard to make accurate quantitative analysis, even though the qualitative analysis, on the close extent of selected models to actual operation of power grid.

虽然采取了计及励磁系统动态行为的详细发电机模型的仿真方法、在东北电网重要发电机组上加装电力系统稳定器(power system stabilizer，PSS)等措施，但PSS参数整定的合理性及整体匹配效果无法得到有效验证，选择电力系统模型尤其是负荷模型还缺乏足够科学依据，对所选模型与电网运行实际的贴近程度也很难做出准确的定量甚至定性的分析。

The greatest expansions of world trade have tended to come not from the bloodless tatonnement of some fictional Walrasian auctioneer but from the barrel of a Maxim gun, the edge of a scimitar, or the ferocity of nomadic horsemen.

3：缺乏激进的情绪，正如mankiw所说的，交易总存在trade-off，总的改进方向很难判断，但是难于判断不代表没有改进，鲁莽有时候会得到好结果，所以它是保守的

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。