单词	femtosecond
释义	femtosecond /ˈfɛmtə(ʊ)sɛkənd / (abbreviation fs) noun One quadrillionth of a second.With femtosecond pulses, scientists could for the first time directly observe the shifts in interatomic spacings that take place during reactions.... A femtosecond is to one second in duration what one second is to 30 million years. In other words, what could you do with a femtosecond x-ray source?
随便看	tart tartan tartan tax tartar tartare Tartarean tartar emetic tartare sauce Tartarian tartaric tartaric acid tartar sauce Tartarus Tartary tart card tarte Tatin tartily tartine tartiness tartlet tartly tartness tartrate tartrazine Tartuffe

英语词典包含243303条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。