The SCM control method of aircraft gun firing shell number is advanced in this paper, also the hardware structure and the software design project are given in detail.

介绍了航炮射击炮弹数目的单片机控制方法，并给出了较为详细的硬件组成及软件设计方案。

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Core electrons are all those electrons held in really tight with the nucleus in the inner shells, whereas the valence electrons are only those electrons that are in the outer-most shell, or at your highest value of n of the principal quantum number.

芯电子是那些,在内壳层被原子核束缚得非常紧的电子，而价电子只包括,最外层的电子，或者说主量子数，n，的值最大的那些电子。

麻省理工公开课 - 化学原理课程节选

The other main difference that we're really going to get to today is that in multi-electron atoms, orbital energies depend not just on the shell, which is what we saw before, not just on the value of n, but also on the angular momentum quantum l number. So they also depend on the sub-shell or l.

我们今天要讨论的,另一个很重要的区别就是,在多电子原子中，轨道能力不仅仅依赖于，我们以前看到的外层，不仅仅依赖于n的值，而是与角动量量子数也有关系,所以它们也依赖于亚外层或者。

麻省理工公开课 - 化学原理课程节选

Shell, Mattel and a number of other major multinationals are now experimenting with innovative third-party auditing processes.

ECONOMIST: Letters

Since Mr. Kaepernick's parents moved last year, Sammy has gotten a larger yard to roam in although the family did write their telephone number on his shell in case he got out again.

WSJ: Colin Kaepernick, 49ers Super Bowl Quarterback, Has a Slow Sidekick -- Sammy the Tortoise

Shell has announced investments in a number of projects including a deep-water project in Nigeria and an oil recovery project in Oman.

BBC: Royal Dutch Shell chief executive Peter Voser to retire