说明：一个卫星绕地球转动的实例，实现了一个物体绕另一个物体按照一定轨迹的转动。
A satellite around the world an example of rotation to achieve an object around another object in accordance with a certain trajectory of rotation.
它们将说明真正的星际尘埃轨迹看上去会是差别显著的。
It may turn out that the tracks of real interstellar dust will look quite different.
文中用导纳轨迹图来说明复数等效折射率的合理性和完整性。
The admittance locus is used to explain the reasonableness and completeness of the complex equivalent index.
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