筛

The fundamental imaging features of osteosarcoma were showed bone destruction, periosteal reaction, neoplastic bone and soft-tissue mass. Among 49 cases examined by radiography, osteoblastic pattern sarcoma was found in 19 cases, osteolytic pattern sarcoma was found in 13 cases and mixed pattern sarcoma was found in 17 cases. The detection rates of bone destruction, periosteal reaction, soft-tissue mass, neoplastic bone and Codman triangle by radiography were respectively 61.2%, 95.9%, 71.4%, 73.5%and 27.7%. All 10 cases with CT scan were showed bone destruction, soft - tissue mass and neoplastic bone. The detection rates of periosteal reaction,憇ieve sign挶 and Codman triangle with CT scan were respectively 90%, 90% and 11%. The tiny neoplastic bone and"sieve sign"were showed sensitively by CT, but Codman triangle was showed by radiography superior to CT.32 cases with MRI scan presented the normal marrow was replaced by the tumor, which was showed low to intermediate signal intensity on T1-weighted images and promiscuity signal intensity on T2-weighted images. 7 cases presented hemorrhage and 24 cases presented necrosis.

骨肉瘤基本影像表现为骨质破坏、骨膜反应、瘤骨和软组织肿块。49例X线表现为成骨型19例，溶骨型13例，混合型17例；X线对骨质破坏、骨膜反应、软组织肿块、瘤骨和Codman三角的检出率分别为61.2%、95.9%、71.4%、73.5%和27.7%；10例CT表现均可见骨质破坏、软组织肿块及瘤骨，CT对骨膜反应、筛孔征和Codman三角的检出率为90%、90%和11%；CT对显示细小肿瘤骨和筛孔征最敏感，但对Codman三角的显示不如X线平片；32例MRI表现为骨髓腔内正常的骨髓高信号被肿瘤信号所取代，T1WI呈低～等信号，T2WI呈混杂信号，7例合并出血，24例中央坏死囊变，32例增强扫描均呈不均匀强化及瘤周可见水肿区。

Gracillima in summer, Coscinodiscus jonesianus in autumn, and Coscinodiscus asteromphalus in winter.

gracillima，秋、冬季的琼氏圆筛藻和星脐圆筛藻。

Methods A retrospective analysis of paranasal coronal computedtomography scans of 200 sides from 100 patients were performed. The junction point between vertical line of orbital plate and anterior cranial fossa, the angle from the line between the above point and attachment point of cribriform plate to horizontal line, the distance from vertical line of orbital plate to attachment point of cribriform plate, were measure respectively.

回顾性分析100例患者200侧的鼻窦CT，在冠状位上测量眶板垂直切线与前颅底交点，此点与中鼻甲骨质筛板附着点的连线与水平线的夹角、眶板垂直切线与中鼻甲骨质筛板附着点之间的水平距离。

Cribriform epithelial stomata were seen mostly in 1.5-month old rats.

筛状囊上皮孔主要存在于1.5月龄大鼠的松果体囊上皮，是由许多密集排列的囊上皮细胞周边部细胞膜凹陷形成的圆形孔洞，筛孔直径200—500nm；喇叭口状囊上皮孔见于1.5月龄和12月龄大鼠的松果体囊表面，由相邻上皮细胞向松果体内部凹陷，形成圆形或椭圆形开口，孔径1～4脚。

Recording electrode was placed on the scalp near the olfactory bulb. Results Electrically evoked olfactory potentials composed of triphasic negative-positive-negative peaks, named N1, P1, N2 respectively, were detected on the olfactory region. The latencies of N1, P1, N2 were 16.27ms, 25.36ms, 49.75ms respectively in cribriform plate.

结果 电极置于筛板和鼻甲嗅区粘膜可记录到一组&负-正-负&三相的诱发电位波，依次命名为N1、P1、N2，当刺激强度为2.0 mA时，筛板粘膜诱发电位的潜伏期分别为16.27、 25.36、 49.75 ms；鼻甲嗅区粘膜诱发电位的潜伏期为20.29、31.31、 46.83 ms。

Objective :In order to provide anatomic data for operation of ethmoidal sinus and optic canal decompression.

目的：研究筛动脉的走行规律及局部位置关系，为筛窦手术和视神经管减压术提供参考。

To provide objective data for the location of the ethmoidal artery in ethmoidectomy.

目的为筛窦手术中筛动脉定位提供客观资料和数据。

It was important to find ethmoidal artery in operation of ethmoidal sinus and optic canal decompression.

在筛窦手术或视神经管减压术中，正确寻找和处理筛动脉有重要意义。

Result: The length of intraorbital segment of anterior ethmoidal artery was 5.16±1.24 mm,and its diameter was 0.56±0.17 mm;the length of intraorbital segment of posterior ethmoidal artery was 9.08±2.29 mm,with diameter 0.37±0.14 mm.

结果：筛前动脉眶内段长(5.16±1.24)mm，管径为(0.56±0.17)mm；筛后动脉眶内段长(9.08±2.29)mm，管径为(0.37±0.14)mm。

An analysis is made in the paper, on the forces acted on particles on screen surface, from which the formular for calculation of screen mesh blinding particles is derived.

文章对振动筛筛面上物料颗料受力情况进行了分析，推导出了堵孔颗粒的计算公式，提出了减少堵孔颗粒的有效方法。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失