occur

occur
(occurred, occurring)
  1. [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
  1. late 15th cent.: from Latin occurrere 'go to meet, present itself', from ob- 'against' + currere 'to run'
英语宝典
考试词汇表