single-tone keying是什么意思，single-tone keying的翻译，single-tone keying音标、读音、用法和例句

Warning: file_put_contents(): Only 0 of 5047 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/oclz.com/index.php on line 55
single-tone keying是什么意思，single-tone keying的翻译，single-tone keying音标、读音、用法和例句_菜篮子兴趣思朗文词典