One gets a contribution from an electron outside closed shells and also a possible contribution coming from an incompleteshell 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。
2
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。
3
Advantages: incomplete Akoya Pearl Shell brims and Angle materials. With star shape black spots. On the whole, clean and without sundries, white jade color.