同义词: eggshell
"the satellite is covered with a smooth shell of ice"
同义词: racing shell
"The enemy has been shelling us all day"
同义词: blast
"The corn shelled"
"He shelled the pitcher for eight runs in the first inning"
"shell the legumes"; "shell mussels"
同义词: husk
以上来源于: WordNet
The men were suffering from shell shock.
这些男人患了炮弹休克症。
A snail's shell is spiral in form.
蜗牛壳呈螺旋形。
The animal retracted into its shell.
这只动物缩回到自己的壳里。
For example,he created a triangle-shaped walkway of steps that sits inside a rounded concrete shell.
VOA: special.2009.12.13
So the 3 s 1, or any of the other electrons that are in the outer-most shell, those are what we call our valence electrons, and those are where all the excitement happens.
它们是经常发生激发情况的,那也是我们所看到,我们称之为价电子,它们是经常发生激发情况的。
So let's do a quick clicker question, and you tell me how many valence electrons does fluorine have? Remember, valence electrons are different from core, they're only the outer-most electrons in the outer-most shell.
那么让我们来做一个小选择题,请大家来告诉我,氟有多少个价电子,要记得,价电子与芯电子不同,它们是在最外壳层的最靠外面的电子。
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