周期性的

• It is easy to see that the economy goes through cycles , with ups and downs . the effects of economic cycles are nothing new
  不难理解的是，经济周期是循环不息，有上有落的，而周期性的影响其实长年存在，并非近来独有的问题。
• Periodic check - pointing provides fault tolerance by allowing a job to resume from the most recent check - point if the job fails
  周期性的检查点可以提供一定的容错能力，方法是如果任务失败，就允许这个任务从最近的检查点恢复执行。
• In humans it affects circadian rhythms , sleep patterns ( melatonin levels increase at night ) , and is implicated in seasonal affective disorder
  它影响人的生理时钟节奏,睡眠模式(褪黑激素水平在晚上增加) ,而暗示着周期性的情感紊乱。
• And the reduction in ice cover may be the result of cyclicalwind circulation patterns and natural variability , not exclusively warmingtrends
  冰盖的减少也可能是源于周期性的风循环和大自然易变的本性，而不只是因为全球暖化的趋势。
• They found that changes in the rate of spread and the timing of peak mortality each year correlated with yearly fluctuations in monthly airline passenger volume
  他们发现每年流感的传播速度和死亡高峰期同每月乘坐飞机旅行的人数周期性的波动。
• Typhoid , paratyphoid , dysentery , polio , viral hepatitis and food poisoning are endemic in the area , and there are periodic outbreaks of cholera
  伤寒，副伤寒，痢疾，小儿麻痹症,病毒性肝炎和食物中毒是当地的地方性疾病,而霍乱也有周期性的爆发。
• Typhoid , paratyphoid , dysentery , polio , viral hepatitis and food poisoning are endemic in the area , and there are periodic outbreaks of cholera
  伤寒症，副伤寒症，痢疾，小儿麻痹症，病毒性肝炎和食物中毒在该地区横行，并且霍乱也周期性的发生。
• We see a periodic radio signal coming from one of them because there ' s a beam which sweeps across the earth like a searchlight as the star rotates
  因为其中一颗星体发出的射电信号会在星体旋转时扫过地球，我们就可以观测到一个周期性的射电信号。
• The microstructure was formed in the surface of the metal coating / polymer composites in the condition of monoaxial stretching and plane compression
  摘要在单向拉伸和平面压缩金属涂层聚合物复合体系的条件下，在体系的表面形成周期性的微观结构。