The fall in incidence of whooping cough in the very young is directly related to widespread immunization with suitability . 幼儿百日咳发病率的下降，是与广泛使用一种适宜的免疫法直接有关。
Differences with regard to the incidence of natural inversion polymorphism are likely to exist between species as well as between sub-species . 自然倒位多型性的发生率在种间以及亚种间可能不同。
Continued exposure to sunlight of people whose skin is not strongly pigmented is related to an increased incidence of skin cancer . 皮肤色浅的人种，如果持续的暴露在太阳光线时，皮肤癌的发病率要增加。
At this point it was necessary to evaluate the normal pattern of loading to be applied to the model for different angles of incidence of the wind . 这里，必须评定在风的不同入射角时施加于模型的荷载的正常型态。
There may be an association between ambient co levels and the incidence of myocardial infarction or sudden death, or the case-fatality percentages . 环境中一氧化碳含量与心肌梗塞发病率，或猝死率、或与致死病例百分比之间也许存在某种关系。
The effects produced when a beam of light falls on a crystal for varying angles of incidence can be readily visualized by a geometrical representation . 投射到晶体上的光束，由于入射角的变化所产生的不同效应，可以很方便地用一种几何图形体直观地显示。
Theory of oblique - incidence achromatic phase retarder 斜入射消色差相位延迟器原理
Incidence and prevention of space decompression sickness 太空减压病的发病率与预防
The incidence of cancer is increasing worldwide 全世界癌症发病率在逐渐增高。
Age - standardized incidence rate of malignant neoplasm of 肿瘤的年标准化发病率
