第一次和第二次底面回波在仪器中对应的时间的翻译：First and second bottom echo instrument corresponds to the time 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

First and second bottom echo corresponding to the instrument

First and second bottom echo instrument corresponds to the time

First and the second bottom surface echo the time which corresponds in the instrument

The first and second floor echoes in the equipment of the corresponding time in

First and second bottom echo instrument corresponds to the time