| 单词 | return busy tone |
| 释义 | return busy tone [ri`tǝrn `biz·ē ´tōn] COMMUNICATIONS An appropriate signal returned to the register-sender that, in turn, returns a busy indication to the calling station. |
| 随便看 |
科学参考收录了103327条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。