With esperience , and with inproved apparatus , it is now possible not only locating a shoal but to tell if it is herring cool or other well - known fish , by the pattern of its echo 根据经验以及先进的设备，现在不仅能判断鱼群的位置，还可以通过回声的种类来判断是青鱼还是其他著名鱼种。
With experience , and with improved apparatus , it is now possible not only to locate a shoal but to tell if it is herring , cod , or other well - known fish , by the pattern of its echo 根据经验和改进了的仪器，人们不仅能确定鱼群的位置，还可以根据鱼群回声的特点辨别鲱鱼、鳕鱼还是其他人们熟知的鱼种。
Non infected seromas after surgery are usually anechoic collections . fluid collections complicated by infection or hemorrhage appear more complex , with ariable degrees of internal echoes , layering , and septa ( figure 2 ) 术后未感染的血清肿常为无回声的积液，并发于感染或出血的积液其表现比较复杂，内部回声程度、分层和分隔常不同（图2 ） 。
There was a great hurry in the streets , of people speeding away to get shelter before the storm broke ; the wonderful corner for echoes resounded with the echoes of footsteps coming and going , yet not a footstep was there 街头一阵忙乱。人们要抢在风暴之前找地方躲雨。这个听回声的好地方震响着跑来跑去的脚步的回声，却没有脚步来到屋前。
Non infected seromas after surgery are usually anechoic collections . fluid collections complicated by infection or hemorrhage appear more complex , with variable degrees of internal echoes , layering , and septa ( figure 2 ) 术后未感染的血清肿常为无回声的积液，并发于感染或出血的积液其表现比较复杂，内部回声程度、分层和分隔常不同（图2 ） 。
A large proportion of the bat ' s auditory receptors ( hair cells in the cochlea ) and large areas in the bat ' s brain are devoted to analyzing a narrow frequency range corresponding to a single harmonic of the returning echo 蝙蝠用很大一部分的听觉受器（耳蜗中的毛细胞）与大幅的脑部区域，来分析一段?围狭窄的频率，该频率正与回声的一个谐波相符。
The corner has been mentioned as a wonderful corner for echoes ; it had begun to echo so resoundingly to the tread of coming feet , that it seemed as though the very mention of that weary pacing to and fro had set it going 前面说过，那街角是一个听回声的绝妙处所。这时一阵逐渐靠拢的脚步的回声响亮地传了过来，仿佛一提起那疲劳的脚音，脚音便开始走来了。
Previous case reports have demonstrated identical us findings in both entities , with bilateral renal enlargement , echogenic cortex and medulla , loss of cortico - medullary differentiation , and small cortical macroscopic cysts < 1 , 2 > 以往的病例报道揭示了这两种疾病在超声表现上的相同之处，即双肾扩大、皮髓质回声的差异消失以及肉眼可见的小的皮质囊肿< 1 , 2 > 。
The improved algorithm has obtained a faster convergence rate and more stability by consuming a little more computation ~ [ 18 ] furthermore , an acoustic echo canceller has been made using tms320c542 ( fix - point dsp ) . the fast lms / newton algorithm has been implemented on this canceller in the real - time processing . it has been proved that fast lms / newton algorithm can obtain a satisfied echo cancellation result ~ [ 17 ] . the implementation of the improved fast lms / newton algorithm is going on in the lab 同时，用德州仪器公司的单片定点dsp ( tm [ s320c542 )构建了声回波对消器的硬件平台，将快速u随s / ne叨仅泊算法应用在实时的声回波对消中，经实时处理验证，该算法不仅龙侄吐了实时处理的要求，而月对回声的抑制达到了满意的效梁切。
