returning echo meaning in Chinese

返回回波
回波, 反射信号
回声反射

Many bats emit an echolocation call that contains a narrow frequency range and then analyze returning echoes to navigate and to detect prey
许多蝙蝠会发出频率?围狭窄的回声定位呼叫，然后分析回声来作导航与侦测猎物。
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。