【医】 secondsry attack rate
twin; two
【计】 binary-coded decimal; binary-coded decimal character code
binary-to-decimal conversion; binary-to-hexadecimal conversion
【医】 bi-; bis-; di-; duo-
era; generation; take the place of
【电】 generation
incidence of a disease
【医】 attack rate; disease incidence; morbidity; morbility