单词	femtosecond
释义	fem·to·sec·ond (fĕmtə-sĕk′ənd) n. One quadrillionth (10-15) of a second.
随便看	Sacco saccular sacculate sacculated sacculation saccule sacculus sacerdotal sacerdotalism sacerdotalist sacerdotally sac fungus sachem sacher torte sachet Sachs Sachs sack sack sack sackbut sackcloth sacker sacking sack out

英语词典包含135693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。