In nineteen-oh-six, the electron tube was considered the single most important development in electronics.
VOA: special.2010.01.31
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。
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
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
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。
"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
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
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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