| 单词 | 周期性 |
| 释义 | 〔REM〕The rapid, periodic, jerky movement of the eyes during certain stages of the sleep cycle when dreaming takes place.眼球速动期：快速的，周期性的，在睡眠周期的某个时期做梦时发生的痉挛性的眼睛的运动〔aperiodic〕Occurring without periodicity; irregular.无周期性发生的；不规则的〔season〕A recurrent period characterized by certain occurrences, occupations, festivities, or crops:旺季：周期性的一段时间，以某些事件、工作、节日或庄稼为物征：〔Baber〕Mongol conqueror of India who made periodic raids into India (1519-1524), captured Delhi and Agra (1526), and founded the Mogul dynasty.巴伯尔：印度莫卧儿征服者，他对印度进行周期性的突袭（1519-1524年），占领了德里和阿格拉（1526年），并建立了莫卧儿王朝〔cyclic〕Recurring or moving in cycles:周期性发生的，往复运动的：〔faradic〕Of, relating to, or using an intermittent asymmetrical alternating electric current produced by an induction coil.法拉第的：感应线圈产生的周期性非对称交变电流的或与之有关的，或利用这种电流的〔pulsate〕These verbs mean to exhibit recurrent rhythmical movements of or like those involved in the periodic expansion and contraction of the heart.这些动词的意思是表现类似心脏周期性扩张和收缩的重复有节奏的运动。〔revolve〕To recur in cycles or at periodic intervals.循环往复：在周期中或周期性间隔中重复出现〔sleep〕A natural, periodic state of rest for the mind and body, in which the eyes usually close and consciousness is completely or partially lost, so that there is a decrease in bodily movement and responsiveness to external stimuli. During sleep the brain in human beings and other mammals undergoes a characteristic cycle of brain-wave activity that includes intervals of dreaming.睡眠：意识和身体的自然的、周期性的休息状态，在这种状态中，眼睛通常闭上，意识全部或部分地丧失，身体活动减少，对外界刺激的反应减少。人类和其它哺乳动物在睡眠期内大脑经历一种特有的脑电波活动循环，其中有做梦时的间歇〔phenology〕The relationship between a periodic biological phenomenon and climatic conditions.物候关系：周期性的生物现象与气候条件之间的联系〔tide〕The periodic variation in the surface level of the oceans and of bays, gulfs, inlets, and estuaries, caused by gravitational attraction of the moon and sun.潮，潮汐：由月球和太阳的重力吸引造成的海洋、海湾、水湾及河口等处水面高度的周期性变化〔tool〕"Modern democracies have the fiscal and monetary tools . . . to end chronic slumps and galloping inflations"(Paul A. Samuelson)“现代社会拥有结束周期性停滞和恶性通货膨胀的财政和金融手段”(保罗A.塞缪尔森)〔rut〕An annually recurring condition or period of sexual excitement and reproductive activity in male deer.雄鹿周期性发情期：雄鹿一年一次的发情和繁殖活动时期和状况〔phenology〕The scientific study of periodic biological phenomena, such as flowering, breeding, and migration, in relation to climatic conditions.物候学，物候现象：研究与气候条件有关的周期性生物现象的科学，如开花、繁殖和迁移〔tetany〕An abnormal condition characterized by periodic painful muscular spasms and tremors, caused by faulty calcium metabolism and associated with diminished function of the parathyroid glands.手足抽搐：一种症状为周期性疼痛肌肉痉挛和颤抖的不正常状态，由钙代谢失调引起，与甲状旁腺功能低下有关〔ultradian〕Relating to or exhibiting periodic physiological activity that occurs more than once every 24 hours.次昼夜的：和每24小时发生超过一次的周期性的生理活动有关的〔Leavitt〕American astronomer who discovered a regular cycle of variation in the brightness of certain stars.勒维特，亨丽埃塔·斯旺：(1868-1921) 美国天文学家，发现了某些恒星亮度的周期性变化〔encyclopedia〕The wordencyclopedia, which to us usually means a large set of books, descends from a phrase that involved coming to grips with the contents of such books.The Greek phrase isenkuklios paideia, made up of enkuklios, "cyclical, periodic, ordinary,” and paideia, "education,” and meaning "general education, literally the arts and sciences that a person should study to be liberally educated.”Copyists of Latin manuscripts took this phrase to be the Greek wordenkuklopaedia, with the same meaning, and this spurious Greek word became the New Latin wordencyclopaedia, coming into English with the sense "general course of instruction,” first recorded in 1531.In New Latin the word was chosen as the title of a reference work covering all knowledge.The first such use in English is recorded in 1644.单词encyclopedia 对我们而言通常是指一大套书， 来源于一个涉及掌握这类书内容的短语。希腊片语enkuklios paideia 是由下列两个词组成的 enkuklios “循环的，周期性，平常的”以及 paideia “教育”， 含义是“普通教育，从字面上说就是一个想接受通才教育的人所应该学习的艺术和科学知识”。拉丁文手稿的抄录者将此片语当成了带有相同词义的希腊词enkuklopaedia ， 而该谬传的希腊词又构成为新拉丁语词encyclopaedia ， 带着其“指导教育的普遍课程”之语意又进入英语，最先记载于1531年。在新拉丁语中该词被选中作为一本覆盖各科知识的参考著作的书名。在英国首次这样的用法记载于1644年〔periodic〕Having or marked by repeated cycles.周期的，周期性的：循环往复的或以此为特征的〔periodicity〕The quality or state of being periodic; recurrence at regular intervals.周期性：周期出现的性质或状态；以固定的间隔而发生〔paroxysm〕Middle English paroxism [periodic attack of a disease] 中古英语 paroxism [周期性的疾病发作] 〔amplitude〕The maximum absolute value of a periodic curve measured along its vertical axis.振幅：沿垂直轴摆动的周期性曲线的最大绝对值〔estrus〕The periodic state of sexual excitement in the female of most mammals, excluding human beings, that immediately precedes ovulation and during which the female is most receptive to mating; heat.（雌性动物的）动情，动情周期：大多数哺乳动物（包括人类）的雌性产生的周期性的性冲动，在此期间内雌性具有排卵的优势，所以该期间最适合性交；刺激〔cycle〕To occur in or pass through a cycle.周而复始，循环：周期性的发生或者运动〔pulsejet〕A jet engine in which air intake and combustion occur intermittently, producing rapid periodic bursts of thrusts.间歇喷气机：一种间歇性地进行气体吸入和燃烧并产生迅速的周期性猛推力的喷气式发动机〔cycle〕A single complete execution of a periodically repeated phenomenon:循环：一种简单完整的周期性重复发生的现象：〔return〕A recurrence, as of a periodic occasion or event:周期：周期性的活动或事件的再现：〔phase〕A particular stage in a periodic process or phenomenon.相，周相：周期性的过程或现象中的特殊阶段〔dipsomania〕An insatiable, often periodic craving for alcoholic beverages.间发性酒狂，酗酒狂：难以控制、往往周期性的对酒精饮料的渴望〔subharmonic〕Of, relating to, or being a wave with a frequency that is a fraction of a fundamental frequency.分（频）谐波的：频率为基波频率整约数的一种周期性波的，与这种波有关的，是这种波的〔swing〕 Vibrate usually implies quick periodic oscillations;it often suggests trembling, pulsating, or quivering: Vibrate 通常暗指快速的周期性摇摆；常常表示颤抖、搏动或微颤： 〔cyclic〕Of, relating to, or characterized by cycles:循环的，周期性的：循环的，与循环有关的，或具有周期特征的：〔roll〕To move in a periodic revolution, as a planet in its orbit.周期性运转：以定期运转的方式移动，如行星在自己的轨道上运行〔buttonwood〕An evergreen shrub or tree(Conocarpus erectus), growing in mangrove forests of tropical America and western Africa and having alternate leathery leaves and small buttonlike heads of greenish flowers. Also called button mangrove 美洲悬铃木：一种常绿灌木或树木（直立锥果木 锥果属） ，生长于美国和西非的热带红树林中，长有周期性更替的革质叶子和由绿花构成的扣形小花冠 也作 button mangrove〔fade〕A periodic reduction in the received strength of a radio transmission.周期性的衰减：在无线电的传送过程中，接收能力的周期性减弱〔serotonin〕An organic compound, C10H 12N 2O, formed from tryptophan and found in animal and human tissue, especially the brain, blood serum, and gastric mucous membranes, and active in vasoconstriction, stimulation of the smooth muscles, transmission of impulses between nerve cells, and regulation of cyclic body processes. 5-羟色胺：一种来源于色胺酸，尤见于脑、血清和胃粘膜等动物和人体组织的有机物，C10H 12N 2O，在血管收缩、刺激平滑肌、神经细胞间冲动传导以及周期性体内过程调节中起作用 |
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