A concept of natural formation and a general RT design method are proposed based on the relative Orbital Element method and the relative motion equation in this paper. An example is given.

基于相对轨道根数法，根据卫星相对运动方程，提出了“自然队形”的概念及队形设计的一般方法，并给出了具体的例子。

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Abstract Hybrid orbital theory is an important content of inorganic chemistry and structural chemistry in college text book, and it is the basis for further study of element compounds.

摘要杂化轨道理论是大学无机化学、结构化学课程的重要内容，是后续元素化合物学习的基础。

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The SGP4 orbital forecast model is given. And the initial selection of two-line element is analyzed at the same time.

给出了SGP4解析轨道模型的具体形式，分析了双行元初值的选取方法。

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So we want to look at any element that has a 3 p orbital filled, but that does not then go on and have a 4 s, because if it had the 4 s filled then we would actually see six lines in the spectrum.

所以，我们要找一找有哪些元素的,3，p，轨道被占据，但没有，4，s，轨道被占据,因为如果，4，s，轨道也被占据了,那我们会在光谱中看到第六条谱线。

麻省理工公开课 - 化学原理课程节选

The answer seems to be that the satellite data corrected by Mr Wentz and Dr Schabel already contained an unintended element of correction for orbital decay.

ECONOMIST: A heated controversy