单词	回声背地
释义	回声背地医back scattered echo
随便看	instrument tape instrumenttation instrument teaching instrument technician instrument technology instrumentted instrument terminal instrument testing instrument test repair laboratory Instrument Test Rig instrument theoretical error instrument time instrumentting instrument tra instrument transducer instrument transformator instrument transformer instrument transformer balancing circuit instrument transformer correc-tion factor instrument transformer for all purpose instrument transformer for direct-current instrument TRANSFORMERS instrument transformer transient characteristic instrument transforming surrounding conductors instrument transit