n. 周期（period的复数）
n an amount of time
n the interval taken to complete one cycle of a regularly repeating phenomenon
n (ice hockey) one of three divisions into which play is divided in hockey games
n a unit of geological time during which a system of rocks formed
n the end or completion of something
n the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause
n a punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations
- 原型: period
英汉双解字典由 ECDICT 提供