Current models of stem cell biology assume that normal and neoplastic stem cells reside at the apices of hierarchies and differentiate into nonstem progeny in a unidirectional manner.

Discrete event simulation , the banks of the queuing system to simulate the system implementation process.

模拟离散事件, 银行的排队系统,模拟系统的执行过程.

By analyzing the features of metro gate ( EnG ) queuing system, a computer simulation model is established.

通过对城市轨道交通进站 检票 机排队系统特徵的分析, 建立了进站检票机仿真系统.

Objective Discuss the use of queuing system at out-patient treatment system to optimization process.

目的探讨利用分诊排队系统来优化 门诊 就医流程.

Thank you for your message, which has been added to queuing system.

谢谢你的来信, 它已被添加到列队等候系统.

Congenital pure rad cell aplasia a report of 6 cases

先天性单纯红细胞再生障碍性贫血6例报告

The Clinical Study on Mercurialism Pure Red-cell Aplasia

汞致单纯红细胞再生障碍性贫血的临床研究

Successful treatment of cervical aplasia using a peritoneal graft

腹膜移植成功治疗宫颈发育不全

Congenital Aplasia of Lung: A Case Report and Review of the Literature

先天性肺发育不全1例报道并文献复习

A New Method for the Treatment of Congenital Thumb Aplasia

一种治疗先天性拇指发育不良的新手术方法

Primary pure red cell aplasia a report of six cases

原发性单纯性红细胞再障&6例报告

A follow-up study in 15 cases with secondary pure red cell aplasia

小儿继发性单纯红细胞再生障碍性贫血15例随访观察

Conclusions Not all children with CHD have congenital thymus aplasia or immunodeficiency. It is not certain that primary immunodeficiency is the reason why children with CHD may be prone to infection.

结论并非所有CHD患儿均伴有胸腺发育不全或免疫功能缺陷，CHD患儿易感染不一定是先天性免疫功能低下的表现。

Aplasia: Defective development resulting in the absence of all or part of an organ or tissue.

发育不全，成形不全：由不完全发育而导致的某器官或组织的全部或部分缺失。

Retinal nerve fibre layer measurements are reduced in patients with obstructive sleep apnoea syndrome

阻塞性睡眠呼吸暂停综合征患者的视网膜神经纤维层厚度减少

For children, the most common cause of medical sleep problems is obstructive sleep apnoea.

对于儿童，医学方面最常见的睡眠问题是阻塞性睡眠窒息症（obstructive sleep apnoea）。

Sleep apnoea makes driving accidents twice as possible.

睡眠窒息症可能令交通事故增加一倍。

Review of treatment of bronchiolitis related apnoea in two centres

两个儿童重症监护病房对毛细支气管炎相关性呼吸暂停治疗情况的回顾

The same problems that cause snoring can cause sleep apnoea.

引起打鼾的那些问题也会导致睡眠窒息症。

Clinical Significance of Total Bile Acid Change after Apnoea of Neonate

新生儿窒息后血清胆汁酸变化的临床意义

Voice 2: Sleep apnoea can also affect the heart.

声音2：睡眠窒息症还可能对心脏造成影响。