They rushed to the harbor and cheered as the bursting shells lighted the dark sky.

VOA: special.2009.08.13

So in terms of total numbers that we would need to complete our octets and fill our valence shells, we would need 18 electrons.

因此要填满我们的“八隅体“,排满所有的价壳层，我们总共需要十八个电子。

麻省理工公开课 - 化学原理课程节选

You know, if I had like shells and peas here I could make some more money. What do I do?

要知道，如果我喜欢贝壳和豌豆的话,那么我可以赚更多的钱？

麻省理工公开课 - 计算机科学及编程导论课程节选

And they could hear the sounds of shots and exploding shells.

VOA: special.2009.08.27

Other than just in poisons and in organic synthesis shells, you might also find them in some things we're more familiar with, such as almonds.

除了在毒药以及有机合成的容器中，你可能还会在我们更熟悉的,东西中找到它们，比如杏仁。

麻省理工公开课 - 化学原理课程节选

Soon the sun's warmth makes them shed crystal shells Shattering and avalanching on the snow-crust-- Such heaps of broken glass to sweep away You'd think the inner dome of heaven had fallen.

VOA: special.2010.09.17

Soon the sun's warmth makes them shed crystal shells - Shattering and avalanching on the snow crust-- Such heaps of broken glass to sweep away You'd think the inner dome of heaven had fallen.

阳光的温暖接着使那水晶的硬壳,从树枝上崩落，一齐倾泻在雪地上-,这么一大堆碎玻璃尽够你打扫,你还以为是天顶的华盖塌了下来。

耶鲁公开课 - 现代诗歌课程节选

Huge amounts of shells and gunpowder were exploded.

VOA: special.2009.12.17

There is a huge difference between the energies in the outermost shell and the inner shells, which tells you that it's unlikely that any electrons except those in the outermost shell are going to be active.

最外层和最里层所具有的能量,有很大差异，而这告诉我们有一点是不太可能的,那就是除了最外层的电子,别的电子都是应该是活泼的。

麻省理工公开课 - 固态化学导论课程节选

Historian and naval officer Samuel Eliot Morison described the fighting this way in his book "The Struggle for Guadalcanal": "For us who were there, or whose friends were there, Guadalcanal is not a name but an emotion, recalling desperate fights in the air, furious night naval battles, frantic work at supply or construction, savage fighting in the sodden jungle, nights broken by screaming bombs and deafening explosions of naval shells."

VOA: special.2011.06.23

So as we go down we're now adding electrons to further and further away shells, so what we're going to see is that the atomic radius is going to increase as we're going down the periodic table.

当我们向下走时,我们会将电子加在越来越远的壳层上，因此我们将看到原子半径,将随我们沿周期表向下走而增大。

麻省理工公开课 - 化学原理课程节选

Officers responded by firing tear gas shells and using their bamboo sticks to repel demonstrators.

VOA: standard.2009.03.28

So to figure out bonding electrons, -- what we take is that number 18, which is our total number of electrons we need to fill valence shells, and we subtract it from our number of valence electrons, which is 10.

那么为了找出成键电子，我们将十八，也就是填满所有价壳层,所需要电子的总个数，减去我们所有的价电子的个数，也就是十。

麻省理工公开课 - 化学原理课程节选

And remember, we're only talking about valence electrons, so the outer-most shells.

要记得，我们讨论的只是价电子，也就是最外层的电子。

麻省理工公开课 - 化学原理课程节选