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。

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

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该法根据八大离子的离子价摩尔浓度占总离子价摩尔浓度百分比的不同，分析百分比在时间或空间尺度上的差异来评价海水入侵，划分入侵程度。

By this method, the seawater intrusion degree can be classified according to the different ionic valence molar concentration percentage of eight ions in the total ionic valence molar concentration.

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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