One gets a contribution from an electron outside closed shells and also a possible contribution coming from an incomplete shell or a hole in a closed shell.

化学键的形成来源于一个满壳层之外的电子，也有可能是形成于一个不完全的壳层或满壳层上的一个电子空穴。

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Want to pick up the shell was carefully examined in the hand, although they are incomplete, but do not have a different feeling.

把捡到的贝壳捧在手心里仔细端详，虽然它们是残缺不全的，但却别有一番滋味。

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Advantages: incomplete Akoya Pearl Shell brims and Angle materials. With star shape black spots. On the whole, clean and without sundries, white jade color.

优点：不完整之马氏杯边角料。带有星状污黑斑点，大体干净无杂物，白玉颜色。

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