Objective to study the clinical characteristics of children orbital dermoid cyst.

目的探讨小儿眼眶皮样囊肿的临床特点。

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Objective:To study the CT characteristics of orbital fracture, and to improve its diagnostic accuracy.

目的：探讨眼眶骨折的CT征象，提高其CT诊断的准确性。

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This paper reveals the dynamical characteristics of relative orbital motion of formation flight and presents the principles and method for the orbit configuration design of formation flight.

本文研究了编队飞行卫星群的轨道动力学特性，提出了编队飞行的轨道构形设计的原则和方法。

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