Staff Sergeant Richard Green, an 82nd Airborne Division mechanic, found this out first-hand when he accidentally damaged his unit's first M-ATV.

VOA: standard.2010.08.01

What's hanging off of the side of this long molecule that's formed by polymerizing nucleotides are - is this base unit.

在这条由多聚核苷酸,构成的长链分子,一侧悬挂着碱基单位

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Some of the books within this very large unit, or at least the traditions within this very large unit, are less influenced by Deuteronomy and its themes and its concerns.

在这一大部整体中的一些经书中，或者至少是在这一大部整体中的一些传统，并没有受到《申命记》及其主题的影响。

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And as I'm going to do many times in 3.091, I'm going to start a unit like this with a history lesson.

在3。091这门课上我会重复很多次，我会像现在一样以一个历史的故事,来开始新的一单元。

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We have the convention of music of writing this symbol indicating the beat-carrying unit of four so I'm writing a four underneath each of these.

我们有一个约定俗成的书写格式,来表示四拍一单元,所以我在每行这里的下面写上一个四

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They'll be coordinated by this one cohesive unit outside.

它们会被一整个宏大的体系,联系组合在一起。

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Dialysis, this is an example of a membrane dialysis unit.

透析技术,这里是一个膜透析的装置

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Now this is a rain gauge, and it's sitting on a roof of a building, and when the water falls into this gauge, it sends a signal to the logic unit of the computer, which immediately notifies the memory bank of the computer to seek out its instructions for a rainy day.

这是一个雨量测量器，安装在一个楼房的,屋顶上，当水流入到这个测量器，它就给计算机的逻辑部件发送一个信号，计算机立即通知内存条,为下雨天找出相应的指令。

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Why this period as a unit?

为什么这段时间被分成一个时间单元

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So for some you that are less interested in maybe the physical structure of an individual atom, now some more exciting material for you might be coming up if you like to think about how, instead, molecules behave, either within bonding, within themselves, or with other molecules, that's what we're going to be heading to in this next unit.

那么对于某些同学，你们或许不感兴趣,对于单个原子的物理结构，现在可能有令你感到兴奋的内容,要出现了，如果你更喜欢思考,分子的行为，或者是关于成键的，或者是关于它们本身的，又或者与其它分子之间的行为，这些将是我们下个单元要讲的内容。

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Here is the unit vector i prime, that's unit vector j prime and here is this vector A.

这是单位矢量 i',那是单位矢量 j',以及这是矢量 A

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This is the SI unit, the systeme international unit for electric charge.

这是国际单位制，电荷的国际单位制。

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We know that this dimension is roughly one angstrom unit, right?

我们知道,它的尺寸大概是一埃，对吗？

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Chemically this is the smallest unit of charge.

化学上说，这是电荷的最小单位。

麻省理工公开课 - 固态化学导论课程节选

So the repeating unit in DNA is this structure here, a nucleotide, which has three different regions.

NA的重复单位就是,核苷酸,它有三个不同的区域

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eV It is a unit of energy. Now, this is 1.0 eV.

它是以单位的能量，现在，这有1。

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For example, this transfer RNA has a unit here, at one end of the transfer RNA molecule.

举个例子,这个tRNA的一端,有一个GAG的碱基序列单元

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Estrogen can combine with this receptor to form a new sort of unit which interacts with DNA.

雌激素能够与受体相结合,形成一个新结构单位与DNA相互作用

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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

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Every unit in the backbone of this ladder has the same sugar unit, the same pentose; it's either RNA or DNA and has ribose or deoxyribose, so you don't need to describe the whole thing.

主链的每个单位,都由相同的糖单位构成,同样的戊糖,RNA里是核糖,DNA里是脱氧核糖,所以你不需要所有细节都描述

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