N-VAR
(疾病等的)發(fā)生，發(fā)生率
The incidence of something bad, such as a disease, is the frequency with which it occurs, or the occasions when it occurs.
例句
The incidence of breast cancer increases with age.
乳腺癌的發(fā)病率隨年齡增長而遞增。
...the high incidence of child mortality.
兒童高死亡率