对它的研究和讨论，在理论上和实际的应用中都有重要意义。

There is important significance to discuss and study it in theory and application.

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图的交叉数问题属于NP -困难问题，对它的研究有重要的理论意义。

The crossing number of graph, which is an NP-complete problem, has an important theory meaning.

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这种鲨鱼状的动物属于神秘的银蛟类。 银蛟可能是现存最古老的鱼类之一，人类对它的研究少之又少。

The shark-like animal belongs to the mysterious and little-studied chimaeras, perhaps the oldest group of fish alive today.

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Water has some pretty unique properties, which we'll deal with a little bit later.

水有很多独特的性质，其中有许多我们到很晚才开始对它进行研究。

麻省理工公开课 - 固态化学导论课程节选

Yeah, good. So, they're actually helium atoms, helium ions. And this wasn't really important for the studies, it didn't matter that didn't know what they are but it's nice to kind of know now - that we do know what they were using.

氦粒子，这对他们的研究并不重要,他们并不需要知道它是什么,但我们最好知道,他们当时用的是什么。

麻省理工公开课 - 化学原理课程节选

Here I just show tissues at two levels of magnification and when we think about tissues we're going to be interested in a couple of different characteristics.

这里我就给你们展示一下,从两个不同水平看到的组织,当我们研究这些组织时,我们将会对它一大堆不同的特点产生兴趣

耶鲁公开课 - 生物医学工程探索课程节选