period

一段时间

一节（课）；一堂（课）

月经

句号

period

时期, 学时, 节, 句点, 周期, （妇女的）经期

过去某段时期的

没有了

period

1. an amount of time; "a time period of 30 years"; "hastened the period of time of his recovery"; "Picasso's blue period"

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2. one of three periods of play in hockey games

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3. a stage in the history of a culture having a definable place in space and time; "a novel from the Victorian period"

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

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5. the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause; "the women were sickly and subject to excessive menstruation"; "a woman does not take the gout unless her menses be stopped"--Hippocrates; "the semen begins to appear in males and to be emitted at the same time of life that the catamenia begin to flow in females"--Aristotle

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6. a punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations; "in England they call a period a stop"

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7. a unit of geological time during which a system of rocks formed; "ganoid fishes swarmed during the earlier geological periods"

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8. the end or completion of something; "death put a period to his endeavors"; "a change soon put a period to my tranquility"

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