periodically的例句（periodically在句子中的用法）

• Mortality is the number or volume of trees periodically rendered unusable through natural causes. 枯损是一类由于自然原因而定期变得无用的林木株数或材积.
• Police were periodically patrolling the area. 警察定时在这一地区巡逻。
• Hairpieces need to be replaced periodically. 假发需要定期更换.
• Prometheus periodically gores the F ring drawing out streamers of material from the ring. 普罗米修斯周期性的F环触的彩带,从材料的戒指.
• Air cooling coils in most refrigerated applications become frosted and must be periodically defrosted. 空气冷却盘管在冷库制冷过程中结霜是经常发生且不可避免的问题,必须要周期性的除霜.
• Henke said. " Yoko would periodically call and speak to whoever answers. " 洋 子会定期打进来,跟接电话的人讲话,不管谁接.
• Economic crises recur periodically. 经济危机周期性地发生.
• Periodically , the lamellae become enlarged, forming flattened, membrane - enclosed vesicles called thylakoids. 片层周期性地扩展, 形成扁平的有膜为界的囊,称为类囊体.
• The geyser erupts periodically. 间歇泉周期性地喷发.
• It makes melt , plasticating, injection and pressure corse go on in the state of vibrating periodically. 分析了此种振动装置在注射阶段脉动螺杆的动态响应以及振幅和频率的特性.