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- Drawing up of periodic maintenance schedules. 制定定期维修计划;
- The venom drawn out from suffering would be enough to poison the whole world in a bloody eruption, bursting out of the volcano of our being. 从喷发的血液中清除出的毒怨足以荼毒整个世界，它正从我们生命的活火山中源源不断地爆发出来。
- What sort of period could you repay us in? 您偿还我们的期限怎么定?
- The idea of time is essentially an idea of periodic repetition. 时间的概念本质上是一种周期性的重复的观念。
- The eruption of volcano makes many people lose their lives. 火山的爆发使许多人丧失了生命。
- Well, that is what the Chilean government seems to be doing with the town of Chaiten (in spanish), which was made unlivable by the continuing eruption of the volcano of the same name. 殊不知，所谓“市场需求”，是变动不居的，就目前的经济形势而言，不仅对刚刚毕业的大学生来说是困难的，对有工作的人而言也是比较大的压力；
- The recuperation of period of time has been met for certain. 一段时间的调理肯定会好的。
- Within everyone there was a latent volcano of unhappiness and discontent. 在每个人心中都有一座潜伏着不幸福与不满的火山。
- The Nevado del Ruiz volcano of Colombia began erupting:on Nov.13,1985 after rum- bling for 6 months,and the disaster due to the eruption caused vast damage and casualties. 1985年11月13日哥伦比亚的内瓦多德尔鲁伊兹火山在隆隆作响6个月之久后开始喷发,这场灾害造成了巨大破坏和人员伤亡。
- An active volcano may erupt at any time. 活火山随时可能喷发。
- Commensurability is an extension of periodicity. 可公度性是周期性的扩张。
- Crater Lake is in the crater of a dead volcano of the Cascade Range. 克瑞特湖在喀斯喀特山脉的一座死火山的火山坑里。
- Demand of readers has peak value of periodicity. 女性读者的需求高于男性读者的需求；
- I subscribed to a lot of periodicals last year. 去年我订了许多期刊。
- volcano of unperiodical eruption 不定期喷发火山
- That volcano cast forth lots of lava and ashes. 那火山喷了出大量熔岩和灰烬。
- The eruption of a volcano is spontaneous. 火山爆发是自发的。
- Such stresses may also explain why pent-up frustrations periodically erupt in France. 这种或许也可以解释为什么积蓄已久的心情失落会在法国周期性的爆发。
- Flames blazed out from the crater of the volcano. 火焰从火山口猛烈地喷出来。
- The mountains of litchi production, which mature April each year, was renowned National"Volcano of litchi. 山上产荔枝，每年四月即成熟，曾是盛名全国的“火山荔枝”。
