劫车事件的发生率高达每天近50起。Car hijackings are running at a rate of nearly 50 a day.据报道，该矿事故发生率是全国平均水平的3倍。The mine reportedly had an accident rate triple the national average.医院中抗甲氧西林金黄色葡萄球菌感染病例不断增长的发生率rising rates of MRSA infectio...

“发生率”的英语可以翻译为：[医] incidence，incidence rate ...