难得到的

The entropy is a very important concept in physics, mathematics and system science. The problem of its minimum value under the condition of constraint is NP-complete and can't be analytical solved.

熵是物理学、数学、系统学等学科中一个非常重要的概念，在约束条件下熵的最小值问题属于NP难的组合优化问题，一般无法得到此问题的解析解。

One of the hardest things was the glasses and their refraction – to get the right personality that we were looking for, a mix of misguided craziness and mischievousness.

最难的部分之一就是制作眼镜和折射——去得到我们想追求的那种个性效果，混合着怪异的疯狂和一些恶作剧的成分。

Be especially in the field of civil case in Guangdong , rural area "carry out area difficult to get rich muchly ",the legal documents having the part suitable to go into effect has had no way to be carried out , has blocked the harmonious sustainable development that rural economy builds gravely.

在广东，农村是"执行难"的多发区，特别是在民事案件方面，有相当部分生效的法律文书无法得到执行，严重阻碍了农村经济建设的和谐可持续发展。

Experimental results verify that the model is more efficient and securer than traditional access control model.

近年来，访问控制模型在企业的管理系统中得到广泛的应用，但是，通常很难正确方便地管理访问控制策略，这主要表现在以下2个方面：(1)随着管理系统中用户数量的增加和程序复

It was extremely hard to get any pictures but I got at least one decent shot of him and another picture of Sidi watching Orlando sign autographs.

我很难拍到照片，不过我最终得到了一张比较好的他的照片，还有一张他的狗Sidi看着他签名的照片。

So you can understand why she turned down a good Job offer to work among refugee immigrants and low－income groups after she got her degree in social sind ie s.

因此，可以理解，她得到社会学学位之后，拒绝了一项很不错的工作，却到达难来美国的移民中和低收入的阶层中去工作。

It's difficult to get a result entirely unanimous with our wishes.

想要按照我们的意愿得到一个完全一致的结论是很难的。

Need not wordy, such in searching engine very hard, two kinds optimize means get admissive, because they are opposite,operate at there are more interiors other way.

无需多言，这样的两种优化方式是很难在搜索引擎中得到认可的，因为它们相对于其他的方式而言包含着更多的内部操作。

The importance of degrees is due solely to theadministrative needs of large organizations. These can certainly affectyour life—it's hard to get into grad school, or to get a work visa inthe US, without an undergraduate degree—but tests like this will matterless and less.

它们肯定能够影响你的人生——没有本科学位，你很难申请研究生院入学，或者得到一张美国的工作签证——但是这种衡量标准的重要性将变得越来越小。

It is not easy to see how a distribution of a large number of individual microphysical systems, each with their own protophenomenal properties, could somehow add up to this rich and specific structure.

这很难明白，对于大量个别的微观物理系统，每个都有自己的主现象属性，是如何能整合得到这个丰富而特殊的结构的。

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。