“permanent echo”的概念、定义、翻译、参考文献-科学参考

单词	permanent echo
释义	permanent echo [`pǝr·mǝ·nǝnt `ek·ō] ^{ELECTROMAGNETISM} A signal reflected from an object that is fixed with respect to a radar site.
随便看	film badge film base film boiling film coefficient film cooling film density film-development chromatography film dosimetry film integrated circuit film jacket film mottle filmogen film opaque film optical-sensing device film plane film platen film pressure film reader film recorder film resistor film scanning film size film sizing table film strength filmstrip

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。