999英语网 英语单词
Femtosecond的音标发音
Femtosecond
英式发音：[fem'tsi:knd]
美式发音
(noun.) one quadrillionth (10^-15) of a second; one thousandth of a picosecond.
手打:尤赖亚
(noun.) one quadrillionth (10^-15) of a second; one thousandth of a picosecond.
手打:尤赖亚