问题是

The key problem of Data Interchange is the standardization of the message formats and contents for communication.

数据交换的核心问题是数据交换的标准问题。

And at the heart of service are relationships: interpersonal relationships, intergroup relationships, and interdepartmental relationships.

服务的核心问题是关系问题，即人与人之间的关系、集体与集体之间的关系，以及部门与部门之间的关系。

An important problem which lies in the sustainable-development- viewpoint, is a problem of intergenerational justice.

蕴含在可持续发展观中的一个重要问题是代际公平问题。

The design of interpolation filter is one of the important problems for all digital implementation of receiver.

插值滤波器的设计问题是接收机全数字化实现的核心问题之一。

In a word, invalidation analysis of mail roll is urgent~ aim at this, we have taken study in theoretical system.

总之，轧辊失效分析问题是急需解决的问题，针对这种情况我们进行了理论上的研究。

The well-known invariant subspace problem is A long-standing problem in operator theory,which has been to determine whether every operator $T$ on a Banach space $X$ must have a nontrivial invariant subspace.

不变子空间问题是一个尚未解决的问题， Enflo反例所给出的没有不变子空间的算子不为任何算子的共轭。

The inverse acoustic scattering problem is an important branch of the research of the inverse problems.

声波反散射问题是反问题研究领域的一个重要分支。

How to determine the isomorphism of graphs is a difficult problem of graph theory,which is not completely solved so far.S.M.

图同构的判定性问题是图论理论中的一个难问题，至今没有得到彻底解决。

Pollution is one of the most important issues in the world today.

污染问题是当今世界上最重要的问题之一。

One source of worry is that so many IVF babies have low birth weight.

但有一个存在的问题是，有很多试管婴儿都有低出生体重的问题。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。