An exact shell clack sheet's geometric size calculation is the most important link n he design of manufacturing a spherical vessel.

精确的球壳瓣片的下料尺寸计算，是设计制造球罐的重要一环。

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So, from going from the shell of n equals 2, let's say, to the shell of n equals 3.

比如说，从ｎ等于２到ｎ,等于３壳层如何变化。

麻省理工公开课 - 化学原理课程节选

And so when we get to n equals three that would be m shell by the spectroscopists' notation.

当n等于3的时候,根据光谱学家的标记法，那就是第m层。

麻省理工公开课 - 固态化学导论课程节选

We're getting further away from the nucleus because we're jumping, for example, from the n equals 2 to the n equals 3 shell, or from the n equals 3 to the n equals 4 shell.

我们将会离原子核越来越远,因为我们在跃迁，比如从，n，等于，2，的壳层到n等于，3，的壳层，或者从，n，等于，3，的壳层到n等于，4，的壳层。

麻省理工公开课 - 化学原理课程节选

Also on Tuesday, an artillery shell struck inside a second U.N. school in the same town, but the boys' prep school was empty at the time, UNRWA director John Ging said.

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The Rainbow Hotel, where U.N. personnel once lived, was a burned out shell.

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