period

时期, 节段, 节, 句点, 学时, 周期

the interval taken to complete one cycle of a regularly repeating phenomenon; (ice hockey) one of three divisions into which play is divided in hockey games; a unit of geological time during which a system of rocks formed; the end or completion of something

当时特有的, 过去某段时期的

就是这话, 就是这么回事