Summary of Background Data. Historically, occipitocervical dissociation injuries have a high rateof associated neurologic deficit with a relatively high incidence of mortality.
背景资料总结： 历史上，寰枕关节分离损伤患者往往存在较高的相关神经功能缺陷，以及相对较高的死亡率。
2
An instrument of measuring the ammonia dissociationrate was introduced.
介绍了一种新型氨分解率测量装置。
3
Our results measured by IR spectrum and gas chromatography show that the dissociationrateof hydrogen compound in natural reactant is anbot 10~4 less than deuterium compound.