concurrent
adj.
late 14c., from Old French concurrent or directly from Latin concurrentem (nominative concurrens), present participle of concurrere (see concur). Related: Concurrency; concurrently. Concurrent jurisdiction is recorded from 1767.
〔蒋〕[ cur，curs，cour，ccurs=run跑，-ent形容词后缀，…的] 同时发生的