英语词汇francium的起源、历史背景-英语词源词典

词汇	francium
词源	Francium. A chemical element discovered in 1939 by French scientist Marguerite Perey and named in honor of her country. See americium.
随便看	not to worry not what it-s cracked up to be not worth a bean not worth a continental not worth a hannah cook not worth a plugged nickel not worth a rap not worth a red cent not worth a row hill of beans not worth a tinker-s damn dam not worth his salt not written in stone nova nova under snow on a sled novella november now barabbas was a publisher now i lay me down to sleep now-now girl nuclear fission nudge nudnik nuke null number

英语词源词典收录了13259条英语词源词条，基本涵盖了全部常用英语词汇的起源、历史，是研究英语词汇或通过词源学英语的必备工具。