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In nineteen-oh-six, the electron tube was considered the single most important development in electronics.
VOA: special.2010.01.31
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So we'll take h 2 and we'll run -- or actually we'll have h 2 filled in an evacuated glass tube.
我们马上就会在氢原子上试一试,我们用氢气-我们把玻璃管充满氢气。
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He had a tube with electrodes potted in it filled with atomic hydrogen. And by applying a voltage, he was able to get the gas to glow.
那是个装满了氢原子并含有电极的管子,通过增加一个电压，他让气体燃烧起来了。
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The BP oil company, which provided the video, says it has been siphoning about 2000 barrels of oil a day using a narrow tube inserted in the well.
VOA: standard.2010.05.18
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What's shown in this diagram is the progress of the developing embryo as it travels in time, down the fallopian tube.
这张图上显示的,就是胚胎发育的过程,是按照它在输卵管中移动的时间排序的
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"If we can reduce some of the capacity on the tube network in the center of London and some of the buses, then that's a good thing."
VOA: standard.2010.07.30
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When we increase the potential between the 2 electrodes that we have in the tube -- we actually split the h 2 into the individual hydrogen atoms, and not only do that, but also excite the atoms.
当我们增大两个电极之间电压,我们有-我们可以把氢气2,分解成单个的氢原子，不仅这样，还能激发原子。
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But the credibility of government officials was dented this week when journalists from Saratov, one of Russia's most severely drought stricken regions, recognized their governor in a You Tube video of Russians detained on July 9th on a yacht near Sicily.
VOA: standard.2010.07.23
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Let's imagine, as he says, human beings as if they were in a sort of laboratory test tube.
让我们设想,人类就像生活在实验室的试管里。
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In fact you do not have to kill any animals for this kind of research because we do everything in a test tube.
其实，做这种研究,你根本用不着杀害任何动物,因为试验都是在试管中进行的。
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This is the diagram taken right from your text, there are the two electrodes coming in and this is atomic hydrogen in the gas tube.
这是从教科书上复制下来的图表，这里有两个电极进来,这是气体管中的氢原子。
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Fertilization of these two where these two cells join occurs in the distal part of the fallopian tube.
受精的过程,就是这两种细胞,在输卵管壶腹部相互结合
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Here's a way that you can do it in a test tube without using any cells by this process called Polymerase Chain Reaction.
但有一个方法可以让你在试管中完成,不用细胞,这个方法叫聚合酶链式反应
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He was doing experiments in a gas discharge tube.
实验是在一个气体放电管中进行的。
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You take advantage of that, you put it in a test tube, together with nucleotides and primers and your DNA.
利用这一点,把它和核苷酸,引物及DNA一起放进试管
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Not every plasmid in your test tube is going to have the right gene inserted in the right way.
不是试管里的每个质粒,都会与正确的DNA片段重组
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You put this chromosomal DNA or this DNA that you're interested in, double stranded into a test tube.
你把这个染色体DNA,或者你感兴趣的双链的DNA,放进一个试管
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We're going to take a chromosomal DNA, we're going to digest it with this restriction enzyme, we're going to put it in this tube and run it on a gel, and we're going to see what results down here.
我们取一条染色体DNA,然后用限制酶进行分解,接着再放,在凝胶上进行电泳,之后看看结果如何
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