verb, adverb · to happen simultaneously

暴雨和强风并发，给这座城市带来了严重的交通压力。

verb · (medicine) for one disease to be complicated by another; to develop simultaneous medical conditions

麻疹常并发肺炎。

verb · (computing) relating to several processes or tasks running or occurring simultaneously

该系统能有效处理高并发请求。

adverb · to happen at the same time; to occur simultaneously

这种现象通常由多种因素并发导致。