periods的中文意思、音标与词形变化

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