查询词典 prediagnostic

objective to explore some ct characteristics and risk factors for traumatic chronic bilateral subdural hematoma.methods a total of 52 patients with chronic subdural hematoma were reviewed.some ct characteristics of bcsdh were studied first.then,the risk factors for bcsdh were determined by logistic regression model from the following variates: age,gender,prediagnostic duration,site for injury force,coma experience and ct showing after injury.results bcsdh was observed in 44.2% of 52 patients with csdh.

作者单位：第三军医大学大坪医院野战外科研究所神经外科，重庆 400042 目的探讨创伤性双侧慢性硬膜下血肿的ct特征及危险因素。方法回顾有随访资料的创伤性慢性硬膜下血肿52例。先研究其ct表现，然后采用多因素logistic回归分析从以下变量中，如年龄、性别、伤后&潜伏&时间、受伤着力部位、受伤时有无昏迷经过、伤时ct表现等确定bcsdh发生的影响因素。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。