出现

To understand whether there is gene reassortment recently, we also analyzed the evolutionary relationship of these isolates. It appears that no HA/NA reassortment was found.

想了解这段时间内是否出现基因重组，我们也分析了这些分离株NA及HA基因的演化关系，结果显示这段时间内的A型流感病毒在HA及NA基因之间没有出现互换的现象。

Regurgitant murmurs are generally early diastolic whereas ventricular filling murmurs occur in mid and late diastole.

回流性杂音一般出现于舒张早期，而心室充盈性杂音一般出现于舒张中晚期。

In 12–30% of patients, repeated repair or reintervention is required because of extension or recurrence of dissection at the previous site of intervention, localised aneurysm formation remote from the site of repair, graft dehiscence, aortic regurgitation, or infections.34 Because of the predilection for the diseased aorta to become aneurysmal at a location distant from the area of dissection, imaging of the entire aorta is advised.

12–30%的患者因出现手术部位夹层进展或再夹层、病灶远处局部动脉瘤、人造血管破裂、主动脉反流或感染而需要再次行修补或介入术。正因为易于在远离夹层的部位出现动脉瘤，要求影像学检查必须包含整个主动脉。

On the 12〓 day, classical DNA ladder appeared after electrophoresis. Fine structural observation showed that the senescence process in this system is a highly ordered programmed cell death process, and its function was speculated as nutrition remobilization. All these suggested that this system is a plant cell apoptotic system.

从第8天开始有些细胞核开始出现TUNEL阳性反应，在处理12天时，总DNA电泳中出现了典型的DNA ladder，超微结构观察发现其衰老过程是一个高度有序的程序化死亡过程，推测功能上是一个营养物质再利用的过程，因而这一体系是一个细胞凋亡体系。

The ureteral stents were kept between 6 to 14 days.The types of ureteral stents were resinic ureteral ducts and doluble"J" ureteral ducts. Results:The data of 364 patients who went through pneumatic lithotripsy before June 2004 were studied retrospetively.

结果：2002年5月～2004年6月，术后未放置输尿管支架管的89例患者中， 42％（37/89）出现输尿管绞痛、感染、尿外渗、发热和无尿等并发症；2004年7月～2006年3月，所有患者术后均放置输尿管支架管，术后无一例出现并发症。

Electron micrograph showed us that hepatocytes were damaged seriously along with the prolonged NHBD time in A group. At the NHBD 120 and 150min in A group, hepatocytes showed numerous cytoplasmic vacuoles and lysosomes, round swollen mitochondria with clear matrix and rough endoplasmic reticula which was not in a stacked arrangement.

电镜发现，A组随着心跳停搏时间的延长，肝细胞的损伤逐渐加重，至120和150min时，肝细胞内可出现大量空泡和溶酶体，线粒体和粗面内质网结构也遭到破坏，但未出现明显的坏死和凋亡改变。

Results All patients had no bladder and urethra injury, no retropubic hematoma, After removal of catheters, 47 patients successfully voided without incontinence, detrusor instability to various degrees developed in 8 patients and were relieved by expectant treatment. 1 suffered urination difficulty and cured by releasing tension sling. All patients were followed up for 3 to 12 months (mean 6 months), neither recurrence of SUI nor lower urinary tract obstruction was found. No graft rejection and inflammation occurred.

结果 所有患者无膀胱、尿道损伤，无耻骨后血肿形成；47例患者术后拔除尿管均能自行排尿并满意控尿，8例患者出现不同程度不稳定膀胱症状，经对症处理缓解。1例出现排尿困难，经松解张力线后缓解，随访3~12个月，平均6个月，无SUL症状复发及排尿困难，无移植物排斤、感染发生。

Therefore,characters of agile enterprise organization in the circulation industry can be concluded asfollows: openness to challenge with high flexibility; vital work teams as basic units ofenterprise organization; variable, alterable, quick and effective exchange and coupling modeof information among work teams; revisable flat network.Generally speaking, concrete forms of agile enterprise organization in the circulation industryare dynamic alliances of enterprises in order to respond to existing or forthcoming marketopportunities.

由此可以将流通敏捷企业组织的特征归结为：流通企业组织是应变的，具有高度柔性；流通企业组织的基本单元是工作团队且充满活力；工作团队之间的信息交流和耦合方式是多样的、可变的，并且快速有效；流通企业组织结构形式是可重组的扁平状网络组织结构；具有上述特点的流通敏捷企业的具体形式一般是企业的动态联盟，是为了及时响应已经出现的或即将出现的市场机遇而组成公司或集团。

The issues of present seismic wavelet frequency caused by different concepts, such as apparent frequency, dominant frequency, peak frequency and centroid frequency, etc., which are defined by different methods, and understanding deviation, definition of seismic wavelet frequency for time and frequency domain are concluded and summarized. On this basis, three kinds of seismic wavelets in common use such as Ricker and Zinc wavelets as well as sine wavelet with exponential attenuation characteristics are analyzed and a conclude is achieved that apparent frequency and dominant frequency are consistent in essence, but peak frequency and centroid frequency as well as apparent frequency or dominant frequency are not completely consistent with different seismic wavelets. For actual seismic data, peak frequency can approximately be used as dominant frequency, but it is not suitable when seismic wavelet is known for it can give out any wrong knowledge and results.

针对目前地震子波频率由于定义方式出现的各种概念（视频率、主频、峰值频率、中心频率等）以及理解上出现的偏差等问题，首先从时间域定义和频率域定义2个方面进行了归纳和总结，并在此基础上对3种常用地震子波（Ricker子波，Zinc子波，正弦指数衰减子波）进行了分析和研究，得出视频率与主频概念一致，但不同地震子波的峰值频率、中心频率和视频率之间并不完全一致的结论；而对于实际地震资料，将峰值频率近似看作地震子波的主频是可以的，但在地震子波已知的情形下这样做是不恰当的，甚至可能会得出错误的结论和认识。

It has been pointed out that a regative error or even an apparent negative roading of tgδ may result if there is a T-network of disturbance present in the measuling circuit or within the test sample itself, but these phenomena have not yet been fully investigated.

如果在测试电路或试样本身内存在T形干扰网络，则tgδ测量值就可能出现负误差或甚至出现负值。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。