incidence
incidence 英 [ˈɪnsɪdəns] 美 [ˈɪnsɪdəns]
n. 发生率；影响；[光] 入射
名词复数:incidences
- Incidence means the frequency with which something bad occurs. You’ll hear of “incidences of cancer” or “incidences of war." You hope the incidence is decreasing, not increasing.
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- n. 发生率；影响；[光] 入射
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1. an area with a high incidence of crime
犯罪率高的地区
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2. The incidence of breast cancer increases with age.
乳腺癌的发病率随着年龄的增长而上升。
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3. the angle of incidence
入射角
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4. It sharply reduces the incidence of traffic accidents.
它大大降低了交通事故的发生率。
- incidence (n.) early 15c., "incidental matter," from Middle French incidence (15c.), from Late Latin incidentia, from incidere "to happen, befall" (see incident (n.)). Meaning "act of coming into contact with or affecting" is from 1650s. In physics, of rays of light, etc., considered with reference to direction, from 1620s.
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