echo-sounding receiver是什么意思，echo-sounding receiver的翻译，echo-sounding receiver音标、读音、用法和例句

Warning: file_put_contents(): Only 0 of 5122 bytes written, possibly out of free disk space in /www/wwwroot/ppbbu/73904.com/index.php on line 55
echo-sounding receiver是什么意思，echo-sounding receiver的翻译，echo-sounding receiver音标、读音、用法和例句_骑士汉英词典