a metric unit of length equal to one quadrillionth of a meter
同义词：femtometer, femtometre
Italian nuclear physicist (in the United States after 1939) who worked on artificial radioactivity caused by neutron bombardment and who headed the group that in 1942 produced the first controlled nuclear reaction (1901-1954)
同义词：Enrico Fermi
fermi详细解释
fer.mi n.（名词）A unit of length equal to one femtometer (0-5 meter). 费米：长度单位，等于一毫微微米(0-5米） 来源：After &B{Enrico} Fermi 源自 &B{恩里科} Fermi
