定义抽象复杂类型和抽象元素的时机与方法。
When and how to define abstract complex types and abstract elements.
本文详细阐述了雷达装备维修性试验与使用评估的目的、内容、时机和方法。
This paper describes the goal, content, time and method of maintenance test and use evaluation for radar equipment in detail.
目的探讨先天性脊柱侧弯的治疗时机与治疗方法。
Objective To review the treatment opportunity and the method for congenital scoliosis correction.
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