in the clear
Referring to radio frequency (RF) transmission with no encryption or scrambling mech-
anism for security purposes. See also encryption, RF, scramble, and security.
科学参考收录了5291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。