| 单词 | periodic event |
| 释义 | periodic event (once / 3939771 pages) n WORD FAMILY periodic event: periodic events USAGE EXAMPLESThe haze has been a periodic event since the 1970s. Los Angeles Times(Oct 21, 2015) He said it's a periodic event and was not done in 2009, and was never planned for this year. Seattle Times(Apr 08, 2011) In his recent Introduction to Mathematics7 Dr. Whitehead has pointed out how the “whole life of Nature is dominated by the existence of periodic events.” Harrison, Jane Ellen, Ancient Art and Ritual(2010) n an event that recurs at intervals Syn|Hypo|Hyper recurrent event migration the periodic passage of groups of animals (especially birds or fishes) from one region to another for feeding or breeding cycle, oscillationa single complete execution of a periodically repeated phenomenon repeat, repetitionan event that repeats sunrisethe daily event of the sun rising above the horizon sunsetthe daily event of the sun sinking below the horizon beat, heartbeat, pulsation, pulsethe rhythmic contraction and expansion of the arteries with each beat of the heart tidethe periodic rise and fall of the sea level under the gravitational pull of the moon cardiac cyclethe complete cycle of events in the heart from the beginning of one heart beat to the beginning of the next; an electrical impulse conducted through the heart muscle that constricts the atria which is followed by constriction of the ventricles Carnot cycle, Carnot's ideal cyclea cycle (of expansion and compression) of an idealized reversible heat engine that does work without loss of heat passone complete cycle of operations (as by a computer) sequenceseveral repetitions of a melodic phrase in different keys cyclea periodically repeated sequence of events rematch, replaysomething (especially a game) that is played again recurrence, returnhappening again (especially at regular intervals) diastolethe widening of the chambers of the heart between two contractions when the chambers fill with blood systolethe contraction of the chambers of the heart (especially the ventricles) to drive blood into the aorta and pulmonary artery pounding, throb, throbbingan instance of rapid strong pulsation (of the heart) high tide, high water, highwaterthe tide when the water is highest low tide, low waterthe lowest (farthest) ebb of the tide ebbtidethe tide while water is flowing out flood, flood tide, rising tidethe occurrence of incoming water (between a low tide and the following high tide) lee tide, leeward tidea tide that runs in the same direction as the wind is blowing slack tide, slack waterthe occurrence of relatively still water at the turn of the (low) tide menstrual cyclea recurring cycle (beginning at menarche and ending at menopause) in which the endometrial lining of the uterus prepares for pregnancy; if pregnancy does not occur the lining is shed at menstruation happening, natural event, occurrence, occurrent an event that happens |
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