n.

周期sp.名词period的复数形式.

periods

名词period

an amount of time

the interval taken to complete one cycle of a regularly repeating phenomenon

(ice hockey) one of three pisions into which play is pided in hockey games

a unit of geological time during which a system of rocks formed

the end or completion of something

the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause--Hippocrates--Aristotle

a punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations

periods例句

用作名词(n.)

The bitch's cycle is pided into four periods.
母犬的发情周期被分为一下四个阶段。

Timer must be disabled when graphing readings for extended periods.
当在观看较长周期的图形和读值时，必须关闭定时器。

periods