穿孔的

The finite element method is applied to analyze the attenuation performance, which is basing on that porous clapboard, porous pipes and absorbent are accurately modeled and the influence of temperature, velocity and tail reflection is taken into account.

采用有限元方法，在对穿孔隔板、穿孔管和吸声材料进行精确建模，并考虑温度、流速和尾管反射对消声的影响的基础上，对消声特性进行分析。

Methods 174 eyes with mycotic corneal ulcer were divided into two groups according to presence or absence of perforation and their prognosis, course of illness, surface area of ulceration, hypopyon, intraocular pressure, microbial spectrum were compared.

回顾性分析近 3年来的 174例真菌性角膜溃疡病例，依据其转归分为穿孔组及未穿孔组，比较两组预后、病程、溃疡面积、前房积脓、眼压及菌种等方面的差异。

By way of comparison, detection of abscess, extraluminal air, and extraluminal appendicolith was 37.5% sensitive, 22.5% specific, and 32.5% accurate in diagnosing perforation, while identification of phlegmon was 40.0% sensitive, 95.2% specific, and 73.5% accurate in diagnosing appendiceal perforation.

通过对比，诊断阑尾穿孔时，脓肿、外漏气体、阑尾结石的诊断敏感性是37.5%，特异性是22.5%，准确性32.5%，然而诊断阑尾穿孔时阑尾蜂窝织炎的诊断敏感性是40%，特异性是95.2%，准确性73.5

The failure mechanism and service sttaus quo of hot piercer point in seamless steel tube were analyzed and its failure was mainly caused by piercer point collapsing nose, sticking steel and cracking.

对穿无缝钢管热穿孔顶头的失效机制和使用状况进行了分析研究，认为穿孔顶头的失效形式主要表现为顶头塌鼻、粘钢、开裂。

A punched card which is an exact copy of a previous punched card.

一种穿孔卡片，它是先前某个穿孔卡片的准确无误的拷贝。

Pertaining to equipment or methods that transmit data from either magnetic tape or punched tape to punched cards.

用以修饰或说明将磁带或穿孔带上的数据传送到穿孔卡片上的设备或方法。

All but 2 of 40 patients with perforated appendicitis had a clearly visualized focal defect in appendiceal wall enhancement, the researchers report, and only 2 of 62 patients with nonperforated appendicitis had false-positive findings for a focal appendiceal wall defect.

四十名阑尾穿孔患者中有两名其阑尾壁的局灶缺损可以被清晰增强显示，六十二名非阑尾穿孔患者中仅两名出现阑尾壁局灶缺损的假阳性发现。

The 25-year decline in nonperforated appendicitis and the recent increase in appendectomies coincident with more frequent use of CT imaging and laparoscopic appendectomies did not result in expected decreases in perforation rates.

需进一步研究确认与非穿孔性阑尾炎相关的术前特征，可能有利于外科医师对于那些非穿孔性阑尾炎的病例行延迟性手术。

Results All fifteen cases had a long term history of otitis media, such as otorrhea sanguine

结果 15例患者均有较长时间的病史，除不同程度的听力下降外，皆有耳溢液，其中脓血性及血性耳溢液 8例；均有鼓膜穿孔，其中松驰部穿孔 10例。

Methods 14 teeth with iatrogenic root canal perforation were selected. The root canals were shaped and cleaned, and then obturated with gutta- percha after MTA was used to repair the perforation in the condition with any blood and moisture.

选取医源性因素造成的根管侧壁穿孔患牙14颗，彻底清理根管并预备根管，在止血隔湿的条件下以MTA 即刻修补根管侧壁穿孔。

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。