4周搞定2000+托福核心词
imperi = im(进入) + peri(周围) = 进入外围，进入外部→危及
nonperishable = non(否定) + peri(周围) + sh(使，造成) + able(能…的) = 不易坏的
odor = od(道路) + or(表名词) = 气味
electrodee = electr(电) + od(道路) + e(名词后缀) = 电极
academic = academ(学院) + ic(…的) = 学院的
acidic = acid(酸) + ic(…的) = 酸的
aesthetically = aesthe(感觉) + tic(形容词) + ally(表副词) = 有感受力地->审美地
draistically = dra(表演) + istic(...的) + ally(表副词) = 表演形式夸大→巨大地
走一周→周期性地
periodically
常考释义
It might be that yawning helps to clear out the lungs by periodically lowering the pressure in them.
打哈欠很可能是通过周期性的降低肺部压力，帮助清除肺部中的这些液体。
来源于：阅读OFFICIAL18 P2adv. 间歇地；定期地；周期性地
Meetings are held periodically to monitor progress.
定期召开会议以监督进度。
Police were periodically patrolling the area.
警察会不时地在该地区巡逻。
Remember that this baseline information might have to be refreshed periodically.
请记住，可能需要周期性地更新这个基准信息。
You must poll an SQS queue periodically to see if it has anything to deliver.
您必须定期轮询一个 SQS 队列，看看它是否有什么可提供的。
It might be that yawning helps to clear out the lungs by periodically lowering the pressure in them.
打哈欠很可能是通过周期性的降低肺部压力，帮助清除肺部中的这些液体。
来源于：阅读OFFICIAL18 P2In the recent past, from about 2.4 million to about 10,000 years ago, nearly a third of Earth’s land area was periodically covered by ice thousands of meters thick.
不久以前，在24万年至1万年前，大约三分之一的地表被上千米厚的冰层定期覆盖。
来源于：阅读OFFICIAL15 P3American paleontologists David Raup and John Sepkoski, who have studied extinction rates in a number of fossil groups, suggest that episodes of increased extinction have recurred periodically, approximately every 26 million years since the mid-Cretaceous period.
美国古生物学家David Raup和John Sepkoski曾经从大量化石群中研究物种灭绝的比率。他们指出，自从白垩纪时期中期以来，灭绝的物种不断增多，大约每隔两千六百万年就会定期发生一次。
来源于：阅读OFFICIAL15 P2The possibility that mass extinctions may recur periodically has given rise to such hypotheses as that of a companion star with a long-period orbit deflecting other bodies from their normal orbits, making some of them fall to Earth as meteors and causing widespread devastation upon impact.
对于周期性出现大规模物种灭绝的可能性，引发了这样的假设：一颗具有长周期轨道的伴星体使其他天体从正常轨道偏离，导致其中一些天体变成流星掉落到地球，撞击时造成大范围破坏。
来源于：阅读OFFICIAL15 P2adv. 循环地；周期地【物】
Periodically repeating configurations
周期性重复配置
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