contemporaneous
adjective formal uk/kənˌtem.pəˈreɪ.ni.əs/ us/kənˌtem.pəˈreɪ.ni.əs/
在同一时期发生（或存在）的;同时期的;同时代的
happening or existing at the same period of time
The two events were more or less contemporaneous, with only months between them. 两件事基本上发生在同一时期，之间只相隔了几个月。
Synonyms: coeval contemporary (OF SAME PERIOD)