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radio echo methods 无线电回波法
Pulse Echo Method (PEM) is a fast,economic and feasible method for Low-strain Dynamic Testing(LDT)of piles. 小应变反射波法是当前在工程桩基检测中应用的动测法之一。
Pre polarizing and spin echo method are often used in NML tool, and the magnetic field used has been changed from primitive earth magnetic field to man made magnetic field. 核磁测井仪中多采用预极化方式或自旋回波法，所用的磁场已从最初的地磁场演变到现在所用的各种人工磁场，所用的测量方式要与采用的磁场设计相适应。
Each of such bodies as tunnel lining, road way and road surface floorslab has only one inspection face, and the shock echo method has become a new technique for detecting thickness and defects. 摘要隧道衬砌、路道、路面楼板等只有一个检测面，冲击回波法成为新的厚度及缺陷检测方法。
Dynamic sonic vibration,pulse echo method,backscatter method,dual transducer methods and ultrasonic spectroscopy analysis were often used for ultrasonic testing. 超声检测方法主要有声振法、脉冲回波法、背散射法、双探头法和超声谱分析法。
This paper introduces the detecting echo methods for multi-beam sonar.It describes the disadvantage of BDI and WMT detecting methods.So Maximal Amplitude Deter-mining Echo method is presented. 摘要详细论述了多波束测深系统的幅度检测方法，指出了传统的BDI和WMT检测方法的缺点，提出了回波最大强度优先法。
Something like this even came up in Hakeem Olajuwon's Hall of Fame career, in the spring of 1991 when the Rockets won 15 games while he was out and Houston talk radio echoed with calls to trade him. 与此相同的甚至出现在名人堂奥拉朱旺的生涯中。在1991年春天当火箭在没有他的情况下赢了15场后，这个休城的广播全部飘散着奥拉朱旺将被交易的消息。
The method seems good but it needs to be tried out. 这个方法似乎不错，但需要试验一下。
A transistorize radio takes no time to warm up. 晶体管收音机不需要预热时间。
TWO INSTANCES ABOUT THE LIMITATION OF THE PULSE ECHO METHOD 低应变反射波法试桩局限性的两个实例
Radio Beijing sends the news all over the world. 北京广播电台向全世界播送新闻。
She petitioned her neighbor to turn down the radio. 她请求邻居把收音机关小点声。
Her performance was cheered to the echo. 她的表演获得长时间的喝采。
They've been plugging his new show on the radio. 他们一直在电台上宣传他的新节目。
How much do you think this radio will sell for? 你认为这台收音机会卖多少钱？
I am able to pick you up on the short wave radio. 我能用短波收音机收听到你的信号。
I was able to pick you up on the short wave radio. 我能用短波收音机收听到你的信号。
The bird-song is the echo of the morning light back from the earth. 鸟的歌声是曙光从大地反响过去的回声。
Let's set the clock by the radio time signal. 咱们照着收音机的报时信号把钟对一对。
His words aroused no echo in their hearts. 他的话未能在他们心中引起共鸣。