occur
v.
1520s, "meet, meet in argument," from Middle French occurrer "happen unexpectedly" or directly from Latin occurrere "run to meet, run against, befall, present itself," from ob "against, toward" (see ob-) + currere "to run" (see current, adj.). Sense development is from "meet" to "present itself" to "appear" to "happen" ("present itself in the course of events"). Meaning "to come into one's mind" is from 1620s. Related: Occurred; occurring.
〔李〕[oc-（ob-）=toward 向；cur=to run⇒“to run toward 向…跑来”→] v. ①appear；be found 出现，存在
〔蒋〕[oc-表示to ，或towards，cur跑；“跑来”→来临] 出现，发生
〔李〕[oc-(ob-)=towards向；cur=to run跑→“to run towards向……跑来”→] v.① come about出现