| 单词 | nonperiodic |
| 释义 | nonperiodic (extremely rare) adj WORD FAMILY periodic: nonperiodic, periodicity+/periodicity: periodicities USAGE EXAMPLESThe nonperiodic structure of a quasicrystal makes it harder for other materials to stick to it, reducing friction. New York Times(Sep 15, 2014) adj not recurring at regular intervals Syn|Ant aperiodic noncyclic not having repeated cycles nonoscillatorynot having periodic vibrations periodic, periodical happening or recurring at regular intervals cyclicmarked by repeated cycles oscillating, oscillatoryhaving periodic vibrations diurnalhaving a daily cycle or occurring every day daily, day-after-day, day-by-day, day-to-dayof or belonging to or occurring every day nightlyhappening every night hebdomadal, hebdomadary, weeklyof or occurring every seven days biweekly, semiweeklyoccurring twice a week hourlyoccurring every hour or payable by the hour half-hourlyoccurring ever half hour biweekly, fortnightlyoccurring every two weeks annual, yearlyoccurring or payable every year biannual, biyearly, half-yearly, semiannualoccurring or payable twice each year biennial, biyearlyoccurring every second year triennialoccurring every third year or lasting 3 years monthlyof or occurring or payable every month bimestrial, bimonthlyoccurring every two months bimonthly, semimonthlyoccurring twice a month semestral, semestrialoccurring every six months or during every period of six months midweeklyoccurring during the middle of the week |
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