Prior to discussing the evaluation of the patient with RP, it is helpful to first briefly review the definition and clinical characteristics of the primary and secondary forms of the disorder.
在讨论雷诺现象患者的鉴定之前，先简单复述一下原发和继发雷诺现象的定义和临床特征。
This paper described the function of neutron source assembly, the principle of neutron emission, and also described the structure and characteristics for primary and secondary neutron source assembly.
介绍了反应堆堆芯中子源的功能，发射中子的原理以及秦山二期工程一次和二次中子源组件的结构和特点。
Primary and secondary students because of age, personality characteristics such as the psychological differences.
小学生因年龄、性格等特征造成的心理差异。
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