[no obj., with adverbial]happen; take place 发生 the accident occurred at about 3.30 p.m. 事故发生在下午3点30分左右。 ■exist or be found to be present in a place or under a particular set of conditions 存在;出现 radon occurs naturally in rocks such as granite. 氡自然存在于花岗岩等岩石中。 ■(occur to)(of a thought or idea) come into the mind of (someone) (想法)产生 [with clause]it occurred to him that he hadn't eaten. 他想到他还没吃东西。
语源
late 15th cent.: from Latin occurrere 'go to meet, present itself', from ob- 'against' + currere 'to run'