Obviously,it goes without saying that 重复 a common and seriously and common phenomenon:traffic jams are prevailing nowadays.笔误吗?重复了两个common,seriously改为serious
The following reasons may be contribute to the phenomenon改为去掉be
economic and technologic 改为名词形式,frequently 改为形容词
大体看了下,还有很多次不太了解用法,不敢胡说