取代RNA核糖的物质叫做“TNA”（苏糖核酸），带有苏糖。

One called TNA replaces RNA’s ribose sugar with a sugar called threose.

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许多研究小组力求确定一个真核核糖的结构（看到向往的结构）。

Many research teams have been striving to determine the structure of a eukaryote ribosome (see 'Structures of desire').

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然后他们用“非常快速温和”的净化技术得到核糖晶体，通过用X射线研究晶体绘出核糖的结构。

They then used "very fast and very gentle" purification techniques to obtain ribosome crystals, from which they worked out the structure with X-rays.

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DNA also has this sort of combinatorial system where you have a finite number of, I guess, bases or amino acids that could combine to a possible infinity of strings of DNA strings.

脱氧核糖核酸也拥有这种组合系统,你的生物基础或氨基酸数量是有限的,但却能组合出,几乎无限的脱氧核糖核酸螺旋结构

耶鲁公开课 - 心理学导论课程节选

This is important because this molecule here, deoxyribose, is not the same upside down as it is - it's not symmetrical upside down and right side up, it's different because the 5' carbon's either pointed up or pointed down.

这很重要,因为对脱氧核糖来说,不都是像这样自上而下的,不是对称的自上向下或全部向上的,长链不同是由于,5'碳向上或者向下的指向不同

耶鲁公开课 - 生物医学工程探索课程节选

So this is a monomer or a single unit from an RNA molecule, you know that because it's ribose and it's the particular molecule that has as its organic base.

所以这是一个RNA单体,即RNA上一个单独结构单位,你通过核糖,和碱基就能够确认它是RNA,这个RNA单体的碱基为A

耶鲁公开课 - 生物医学工程探索课程节选