查询词典 absence

Abstract］ objective to explore the failure causes of mastoidectomy and precautions.methods the operation findings of 37 cases who underwent revision mastoidectomy from 1995 to 2005 were analyzed for causes of the primary procedures and revision mastoidectomy failure.results original symptoms disappeared.all cases achieved a dry ear after mastoidectomy 1～3 months.conclusion causes of failure of mastoidectomy include unfamiliarity with regional anatomy,absence of skill of surgeons,unadequate opening of mastoidale,and clinical experiences.each of these can result in residual lesion and inadequate drainage.some exceptions can also result in reoperation.to resect the pathological changes tissue thoroughly,to remain good drainage after operation,to manage some execptions are keys to prevent reoperation.

目的 探讨乳突根治术不能干耳原因及预防措施。方法对我科1990~2005年收治的37例乳突根治术不能干耳患者的再次乳突手术所见进行分析，并行二次乳突根治术。结果术后1～3个月患者原有症状消失、干耳。结论乳突根治术失败原因主要是术者中耳乳突解剖不熟、基本功不过硬、临床经验不足导致病灶残留、引流不畅和乳突尖开放不够及某些特殊情况所致。术中彻底去除病灶，保证术后引流通畅及特殊情况的处理，是防止二次手术的关键。

In order to explore the function of glia in the progress the experiment was performed both in presence of glia and in the absence of glia The mouse mesencephalic cells were exposed with MPP+ with different concentration. Iloprost was used to investigate whether it can prevent dopamine neuron from the neurotoxic of MPP~..

为了观察胶质细胞在其中的作用，将细胞分为未抑制胶质细胞和胶质细胞抑制组；将不同浓度的MPP~+加入体外培养的中脑多巴胺能神经元培养液中，并加入Iloprost来研究其对MPP~+所导致的神经毒作用是否有保护作用。

Maxillary second molar has five subtype, Type A: absence of root fusion, Type B: presence of mesiobuccal and distobuccal root fusion, Type C: palatal root with anyone of buccal root fusion of molar with three roots, Type D:complete root fusion of molar with three roots, Type E:pseudofusion of molar.

分析其牙根发育沟之发生率、牙根发育沟之长度、牙根发育沟至牙骨质牙本质交界的距离，以及牙根发育沟最深点的深度、占牙根长的位置、与到牙根根管的距离，并且将牙根分类为上颚第一大臼齿，仅一种分类。

The Metallurgic Industry is one of the pillar industries in Ukraine. But due to absence of advanced technology, the huge production potentials is not taped yet.

黑色冶金业是乌克兰国民经济支柱产业之一，生产能力巨大，但多年来缺乏技术改造，设备陈旧落后，蕴藏着巨大的改造潜力。

And different views about it s tectonic environment is partly due to absence of reliable metamorphic PTt path .

关于其成因及大地构造环境一直存在不同认识，问题的关键是缺乏可信的变质作用PTt轨迹。

Four iertransform infrared microspectroscopy was used to investigate the effects of C-terminal acidic protein on the secondary structure of wheat α-thionin in the absence of signal pepti deduring the prokaryotic expression process.

采用傅里叶变换显微红外手段研究了在信号肽缺失的情况下，C-末端酸性蛋白的存在对小麦α-硫素原核表达过程中蛋白质二级结构的影响。

But minable uranium deposits can hardly formed in this period because of absence of abundant uranium-rich groundwater and strong absorption of humus and magnalite.

然而这一阶段由于缺乏大规模富铀地下水的注入，以及腐殖质和蒙脱石强的吸附能力，故难以形成具有工业价值的铀矿床。

We show that in the absence of the external driving field,excitonic entanglement and mixedness exhibit a periodic oscillation.

结果表明：当无外加驱动场，激子的纠缠度和混合度呈现周期性的振荡。

Diagnosis is based on, the repetitive and monomorphic nature of the manifestation, the patient knowledge of his simulation but his refusal to admit it, the absence of looking for any beneficial effects.

诊断基于反复出现的单一病态表现、患者对于模拟病态有一定认识却拒绝承认、患者不寻求任何获益。

A key quality requirement for display photomasks is the absence of mura.

展示photomasks的关键质量要求是缺乏mura。

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"