incidence [ˈɪnsɪdəns]
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基本释义
n.发生,影响;入射
英英释义
an event , or the rate at which something happens
参考例句
The angle of incidence equals the angle of reflection. 入射角等于反射角。
The incidence of this disease has dropped considerably in the past few years. 近几年这种病的发病率大大降低了。
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