| 单词 | incidence |
| 释义 | incidence n. 1. (often foll. by of) the fact, manner, or rate, of occurrence or action. 2. the range, scope, or extent of influence of a thing. 3. Physics the falling of a line, or of a thing moving in a line, upon a surface. 4. the act or an instance of coming into contact with a thing. Phrases and idioms angle of incidence the angle which an incident line, ray, etc., makes with the perpendicular to the surface at the point of incidence. Etymology: ME f. OF incidence or med.L incidentia (as INCIDENT) |
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