难得

And happiness seems to be something that is in short supply for too many of us!

快乐在我们这些人里，是多么难得的东西啊！

You are a rare talent, I hope you graduate, you can come to our inaugural .

你是一个难得的人才，希望你毕业之后，可以来我们公司就职}。

The conventional matrix decomposition methods have been used to find the least-squares solutions of the abovementioned inconsistent matrix equations over given matrix set in many references, and the general expressions of these solutions were obtained. But it is difficult to determine the solution of Problem I by utilizing these expressions due to the fact that the orthogonal invariance of Frobenius norm does no hold for the general nonsingular matrices.

对于求上述不相容矩阵方程在给定矩阵集合上的最小二乘解，很多文献中利用传统的矩阵分解方法得到了其通解表达式，但是利用该表达式很难得到问题Ⅰ的解，这是因为一般的非奇异矩阵并不满足Frobenius范数的正交不变性。

At the same time, the characteristic equations of the controlled systems with time delays are transcendental equations and belong to infinite dimensional systems, so it is difficult to study the time delay systems in mathematics theory and also difficult to obtain good performance for the time delay systems using the controller designed by classical control theory.

同时，由于含有时滞的控制系统的特征方程是超越方程，属于无穷维系统，对时滞系统的研究在数学理论上是非常困难的，有很高的理论价值，而且通过经典控制理论设计出来的控制器对时滞系统很难得到良好的控制效果。

Of course No one, because I am not an infuser at all.

人海中，难得有几个真正的朋友，这份情，请你不要不在乎。

New York lost its interleague game at Washington 11—9 on a rare blown save by Mariano Rivera.squandering a seven一run lead.

纽约十一日在华盛顿失去interleague游戏-9挽救了一个难得的吹MarianoRivera。

On the one hand, it has brought about some favorable opportunities for the ideological and political education. For instance, the abundance of information offered by the information society has provided adequate educational resources; the swiftness, openness and interrelatedness of the modern information technology has widened the educational space, improved the channels for the acquisition of information.

一方面，它给思想政治教育带来了难得的发展机遇，例如：信息社会申丰富多彩的信息为我们开展思想政治教育工作提供了充足的可利用教育资源；现代信息技术所具有的传播快捷、开放性、交互性等特点为拓展思想政治教育空间、拓宽信息获取渠道和方式方法的改进等都创造了非常有利的条件。

In this paper , for the problem of 3-D inversion , the author has been worked in some fields that based on the study of foregone and absorbed some of the theories .

目前，三维正反演问题研究由于计算精度和速度等关键问题未能解决，在实际工作中很难得到应用和推广。

So it was rare to see Iranian chocolate or anything else.

因此，这是难得的看到伊朗的巧克力或任何其他。

Second, it is a tremendous opportunity to meet other people who have caught the itch.

第二，这是一个难得的机会，以满足其他人出线痒痒。

This paper discusses design and realizable methods of remote test output interface from logical design angle.

本文从逻辑设计的角度讨论遥测输出接口的设计及实现方法。

This also 星体投射plies to buildings, structures and geological features.

这也适用于建筑物和地质特征。