讨论了区域卫星导航系统卫星星座设计中所用卫星轨道类型。

The orbit of the satellite constellation for local navigation system is discussed.

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当对导航精度要求较高时，轨道越高，尤其在高轨道类型中，应尽可能的选择精度高的敏感器以及尽量长的观测时间。

When navigation accuracy is highly expected , the sensor with higher accuracy should be chosen and the observation time should be longer , especially in high - altitude orbit.

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这种类型卫星在执行低轨道攻击任务时，从发射到攻击的共需要不到15分钟的飞行时间。

Total flight time from launch to impact for these types of weapons is usually less than 15 minutes when attacking low orbits.

youdao

We don't have to just stick with carbon, we can think about describing other types of atoms as well using this hybridization.

我们不用局限于碳，我们可以考虑利用杂化轨道,描述其它类型的原子。

麻省理工公开课 - 化学原理课程节选

All right. So, when we have, for example, l equal to 1, what kind of orbital is this?

好，例如，当我们有l等于1时，轨道是哪种类型的？

麻省理工公开课 - 化学原理课程节选

So, for example, if we look at the 2 s orbital of argon, it's going to have the same amount of nodes and the same type of nodes that the 2 s orbital for hydrogen has.

所以举例来说，如果我们看氩的2s轨道，它有相同数量的节数,和相同类型的节点,对于氢的2s轨道。

麻省理工公开课 - 化学原理课程节选