【醫(yī)】 secondsry attack rate

二的英語翻譯：

twin; two
【計】 binary-coded decimal; binary-coded decimal character code
binary-to-decimal conversion; binary-to-hexadecimal conversion
【醫(yī)】 bi-; bis-; di-; duo-

代的英語翻譯：

era; generation; take the place of
【電】 generation

發(fā)病率的英語翻譯：

incidence of a disease
【醫(yī)】 attack rate; disease incidence; morbidity; morbility