English → Chinese
occurrence
/BrE əˈkʌr(ə)ns 
, AmE əˈkərəns /
noun
1 [countable] (event) 发生的事;
a regular/an unusual occurrence 定期发生的／不寻常的事
2 [uncountable] (incidence) 发生;
the frequent occurrence of this disease 这种疾病的频繁出现;
the occurrence of cancer increases with age 癌症发病率随年龄的增长而增长
3 [uncountable and countable] (presence) 存在; (instance) 存在情况