回声

Sonographic features included irregular shape, microlobulation, spiculated margin, halo, posterior attenuation, microcalcification, ductal distortion.

病变的超声征象包括：形态不规则、小分叶、毛刺、强回声晕、后方回声衰减、微小钙化、导管扩张。

No shoot, says Friday, no yet, me shoot nom, me no kill; me stay, give you one more laugh; and indeed so he did, as you will see presently; for when the Bear see his Enemy gone, he comes back from the Bough where he stood; but did it mighty leisurely, looking behind him every Step, and coming backward till he got into the Body of the Tree; then with the same hinder End foremost, he came down the Tree, grasping it with his Claws, and moving one Foot at a Time, very leisurely; at this Juncture, and just before he could set his hind Feet upon the Ground, Friday stept up close to him, clapt the Muzzle of his Piece into his Ear, and shot him dead as a Stone.

主人！但他毕竟是个勇敢的男子汉，立即催马冲到向导跟前，拿起手枪，对着那只狼的头上就是一枪，结果了那畜牲的生命。可怜的向导应该说运气不错，因为他碰上了星期五。星期五在他家乡与野兽打惯了交道，所以一点也不害怕。他能坦然地走到狼的跟前，一枪把它打死。要是换了别人，就不敢靠得那么近开枪了。而从远距离开枪，不是打不着狼，就是可能打着人。即使像我这样胆大的人，见此情景也着实吓得心惊肉跳。说实在的，我们一行人都吓得魂不附体，因为，紧跟着星期五的枪声，我们就听见两边的狼群发出一起最凄惨的嚎叫，山谷里又发出阵阵回声，结果狼嚎和回声此起彼伏，犹如成千上万的狼在吼叫。说不定来的狼确实也不止这几只，要不，我们也不至如此惊恐万状了。星期五打死了那只狼之后，另一只本来紧咬着马不放，登时也松了嘴逃跑了。幸亏这只狼咬住了马头，马勒头上的铁圈刚刚卡住了狼的牙齿，因而马没有受什么伤。可是向导的伤可不轻，因为那只激怒了的野兽一共咬了他两口，一口咬在肩膀上，一口咬在他膝头上方。而且，当星期五上前把狼打死时，他那匹受惊的马几乎把他摔了下来。不用说，一听到星期五的枪声，我们立即催马向前。

In practical implementation of acoustic echo cancellation , subband technology is used to improve the system performance and reduce the computational complexity of the algorithm.

在语音通信中，声回声抵消技术是一种用于消除在扬声器与传声器共存情况下所产生的回声干扰的技术。

An adaptive conjugate gradient algorithm based on subband decompsition structure was proposed for acoustic echo cancellation in communication systems.

针对通信系统中的声学回声干扰问题，研究了一种快速收敛和有效的自适应回声抵消算法。

Seven cases with portal vein tumor thrombus were diagnosed by CO2-hepatic arterio-sonography (CO2-HAS). Their ultrasonographic features of CO2-HAS were as follows: several seconds after the injection of CO2 microbubble contrast, bright cloudy flowing echoes or several flowing echo stripes along the long axis of portal vein were seen in tumor thrombus. During interrupted phase of CO2 contrast injection there were still scattered unflowing bright echoes in tumor thrombus.

应用二氧化碳(CO2)肝动脉造影诊断 7 例门静脉癌栓，其造影增强声像图表现为：注射CO2微泡造影剂数秒钟后即可见癌栓光团弥漫性光点闪动，似白云翻滚或门脉实体回声内有数条和门静脉管径长轴平行的微气泡光带流动，停止注射后门静脉实体回声内仍有弥漫性非流动性增强光点，持续时间较长。

Seven cases with portal vein tumor thrombus were diagnosed by CO2-hepatic arterio-sonography (CO2-HAS). Their ultrasonographic features of CO2-HAS were as follows: several seconds after the injection of CO2 microbubble contrast, bright cloudy flowing echoes or several flowing echo stripes along the long axis of portal vein were seen in tumor thrombus. During interrupted phase of CO2 contrast injection there were still scattered unflowing bright echoes in tumor thrombus.

中华超声影像学杂志/980401 摘要应用二氧化碳(CO2)肝动脉造影诊断 7 例门静脉癌栓，其造影增强声像图表现为：注射CO2微泡造影剂数秒钟后即可见癌栓光团弥漫性光点闪动，似白云翻滚或门脉实体回声内有数条和门静脉管径长轴平行的微气泡光带流动，停止注射后门静脉实体回声内仍有弥漫性非流动性增强光点，持续时间较长。

Overview: Fox company has been completely wiped out by a miscalculation of explosive resources by Air support in a nearby sector while converging on two prometheus sized zulus. Unofficially this miscalculation was due to GOLF company requiring resources with nuclear capabilities within that sector. To make matters worse, GOLF company had apparently planned out the desertion plan and has sabotaged numerous sentries located in their armories. The need and urgency of detecting the nuclear facilities as well as the dangers that GOLF company may unleash has called upon Echo to retrieve all the array equipment by placing them within trucks stowed within the hangars of the airstrip before GOLF company decides upon removing Sector E off the map and along with it any sentries.

任务概要：狐狸战斗小队已经在一次围剿普罗米修斯级别的怪物时不幸被空军的轰炸误伤完全消灭，有传言说这次的误伤主要是由于高尔夫战斗小组在该地区申请核武器装置所造成的，更糟糕的是，他们已经蓄意破坏了安置在他们战斗服中的传感定位器，防止高尔夫小组释放核装置的任务已经指派给回声小组，指挥部需要回声小组在高尔夫小组将13地区连同所有传感器从地图上消灭之前找到并回收所有的核装置，并将他们放回位于飞机跑道仓库中的卡车里。

What they produced is not a feasible solution but an echo or rewording of the Central Government decree, according to Luo Wei from Shenzhen Municipal Legal Affairs Bureau, who is responsible for reviewing this "echo".

什么他们生产不是能实行的解决但是回声或中央的政府法令的重述，依照来自深圳的 Luo Wei 市政的合法事件局，负责检讨这一声&回声&。

The cast extended from the dilated inferior cave vein into the right atrium, and the inferior cave vein, common iliac vein, internal iliac vein were also filled with free-floating cast. Four patients underwent surgery, and the pathological results were correlated with CDFT.

结果 7例患者超声图像均显示右心内随心动周期漂浮样运动的网格状或实质性的肿物回声，并与下腔静脉和／或骼静脉内的肿物回声相连，诊断为心内平滑肌瘤病。4例患者行手术治疗，病理结果与超声结果一致。

During the period of double talk, the near-end signal would be affected as well as the undesired echo in the cancellation or suppression process, so that the amount of the attenuation would be interesting to know.

在此期间的双重谈话，近端的信号会受到影响，以及回声取消或抑制过程中也会收到影响，从而我们会知道回声衰减的数量。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐