“Roman Empire”概念、定义、翻译-科学时代

单词	Roman Empire
释义	历史学词汇手册 Roman Empire 罗马帝国（公元前27—公元476的罗马奴隶制国家）
随便看	pulse rebalance pulse receiver pulse recurrence frequency pulse reflection pulse-registering device pulse relay pulse repetition frequency pulse repetition frequency pulse repetition frequency (PRF) pulse response pulse response pulse rise time pulse rise time pulse rise time pulse rise time pulse rocket motor pulse sampler pulse-sampling technique pulse selection pulse sensor pulse separation pulse sequence pulse shape pulse shape pulse shape discrimination

科学时代收录了1160609条科普词条，基本涵盖了常见科普常识及英语词汇的翻译，是科学学习和研究的有利工具。