Occurrence

她因疑惑 [那事件] 而心烦意乱。

值得注意的是根瘤中出现血红蛋白。

偶然事件

试比较event、 occurrence、 incident叁词.

蚀是不常见的事情。

【记】occur-发生、出现,r-重复字母,ence-名缀:发生的事情

occurrence n 1 [C] event; incident; happening 事件; 事情; 发生的事 Robbery is now an everyday occurrence. 抢劫的事现在每天都有. an unfortunate occurrence 不幸事件. 2 [U] (fml 文) fact, frequency, etc of sth happening 事情发生的事实或频繁 He's studying the occurrence of accidents on this piece of road, ie how often, etc they take place. 他在研究这段路上发生事故的情形. 3 (idm 习语) be of frequent, rare, common, etc oc`currence (fml 文) happen or take place frequently, rarely, etc 经常、 很少...发生 Riots are of frequent occurrence in this province. 这省经常发生骚乱. occurrence, NOTE ON USAGE 用法 Compare event, occurrenceand incident. 试比较event、 occurrence、 incident三词. Occurrence is the most neutral and does not indicate a particular type of happening *occurrence为中性词, 并不特指某类型的事 Divorce has become an everyday occurrence. 离婚已成为每天都有的事了. An event is often a happening of importance *event常指重大事件 Their wedding will be quite an event, ie a large number of people will attend. 他们的婚礼将是件大事（即将有许多人参加）. The events of 1968 changed Western society. 1968年的事件改变了西方社会. An incident is usually of less importance, often occurring in a narrative *incident通常指不太重要的事情, 经常出现於叙述中 You don't have to write down every little incident in your life. 你不必把生活中每一件事都记录下来. It can also refer to a conflict or disagreement, often involving violence 这个词还可指冲突或不和, 常涉及暴力行动 The kidnapping caused an international incident. 这一绑架事件引起了国际纠纷.

occur（v.发生）+rence－发生的事情

*[ә'kʌrәns]n. 发生, 事件, 出现【医】 发生相关词组: be of rare occurrence be of frequent occurrence

①发生，出现 ②事件，存在