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青少儿英语指南    2019-03-05 12:09:20



英音 [ˈpɪəriəd] 美音 [ˈpɪriəd]


n. 时期;(一段)时间;学时;句号;

adj. 具有某个时代特征的;(关于)过去某一特定历史时期的;(家具、服饰、建筑等)某一时代的;


  1. an amount of time;

    "a time period of 30 years"
    "hastened the period of time of his recovery"
    "Picasso's blue period"

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

  3. (ice hockey) one of three divisions into which play is divided in hockey games

  4. a unit of geological time during which a system of rocks formed;

    "ganoid fishes swarmed during the earlier geological periods"

  5. the end or completion of something;

    "death put a period to his endeavors"
    "a change soon put a period to my tranquility"

  6. 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"
    "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"

  7. 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"

periodic adj. 周期的;定期的;回归的;间歇的,时而发生的;
periodical n. 期刊;杂志; adj. 周期的,定期的;时常发生的;定期发行的,期刊的;
periodicity n. 定期,周期性;周律;
periodontal adj. 牙齿周围的,齿根膜的;
periodontia n. 牙周组织(periodotium的复数),牙周病学;牙周组织(尤指牙周膜)( periodontium的名词复数 );
periodontics n. 牙周病学;
photoperiod n. 光周期;

drying period 干燥时期;
blocking period 闭锁期,阻塞周期;
induction period 诱导期;
alchemistic period 炼丹时代;
shakedown period 试航期;
period delay 延期装置;
number period 数字周期;
accounting period 会计期,会计年度;
pupal period 蛹期;
masking period 掩蔽期间;
achromic period 消色期;
explosion period 爆燃期;
preboreal period [医]前北方期;
humid period 湿润期;
damping period 激后复原期,阻尼时间;
photometric period 光度周期;
previposition period [医]产卵前期;
pause period 停机时间;
pay period 发工资期;
qualifying period [经] 试用期;
period meter 回声探测器[计时器],原子核循环计;


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