1650s, from Medieval Latin simultaneus, perhaps from simultim "at the same time," extended from Latin simul "at the same time" (see similar (adj.)), or from simul with ending abstracted from Late Latin spontaneus, where the -t- is organic. Related: Simultaneously.
例文
1. There were several simultaneous attacks by the rebels.
反逆者は同時にいくつかの攻撃を始めた。
2.The two simultaneous shots sounded like one.
同時に発せられた2発の銃声は1発のように聞こえる。
3.We need a simultaneous interpreter.
同時通訳が必要です。
4.This event was almost simultaneous with that one.
このことはほとんどそのことと同時に発生した。
5.The conference hall is provided with facilities for simultaneous interpretation in five languages.