| 正面 | 5923.incidence 英 ['ɪnsɪd(ə)ns]美 ['ɪnsɪdəns]     |
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| 背面 |      释义： 1. propagation => prop "vine prop, support".n. 发生率；影响；[光] 入射；影响范围 例句： 1. an area with a high incidence of crime犯罪率高的地区 incidence 发生率来自incident,偶发事件，发生。引申词义发生率。 incidence (n.)early 15c., "incidental matter," from Middle French incidence (15c.), from Late Latin incidentia (see incident (n.)). Meaning "act of coming into contact with" is from 1650s; sense in physics is from 1620s." |