adj.(形容词)

1. 周期的
2. 定期的
3. 间歇的
4. 周期性的
5. 间发性的
6. 时而发生的
7. 【数】循环的
8. 周期函数的
9. 【语】完整句的
10. 回归的
11. 定时的
12. 时时的
13. 【化】高碘的
14. 某一时期的
15. 【修辞学】掉尾句的
16. 圆周句的
17. 美词丽句的
18. 定期发生的

n.(名词)

1. 定期

adj.(形容词)

1. 周期的；定期的，定期发生的 happening fairly regularly

Adjective:

1. happening or recurring at regular intervals;

   "the periodic appearance of the seventeen-year locust"
   

2. recurring or reappearing from time to time;

   "periodic feelings of anxiety"
   

1.间发性的；定期的；周期的
periodic events or situations happen occasionally, at fairly regular intervals.

e.g. periodic checks are taken to ensure that high standards are maintained.
定期检查以确保维持高水准。
e.g. ...periodic bouts of illness.
周期性发病

1. 周期性：重力场波来源的型式可分为三大类:脉冲性(impulsive)、周期性(periodic)和随机性(stochastic,见表一). 脉冲性来源一次产生一个波,可持续几个毫秒,相当於声波穿过崩溃中的星球内核所需的时间. 星体崩溃时物质高速运动是脉冲性重力场波的一大来源,

2. 周期性的：这些彗星中有 184 个是周期性的(periodic)彗星(轨道周期少於 200 年而剩下来的其中一些无疑地也是周期性彗星,但我们并没有足够精确的资料来确定出它们的运行轨道.

3. 周期：根据对变量的不同要求,数据存储的触发方式有3种:根据周期(periodic)、根据变化(On Change) 和根据需要(On demand). 其中根据周期方式中又有多种时间类型可供选择. 存储文件的管理也很方便,操作人员可选择文件生成的间隔时间并自动删除过期文件.

Long long ago, we knew the periodic motion of a planet.

很久以前, 我们就知道行星的周期运动。

Why are the version numbers not in any particular periodic sequence?

为什么版本号不是按照任何特定的周期序列?

The doctor made periodic visit to the house to see if the baby was all right.

医生定期到这家进行拜访,检查婴儿的健康。

There is a periodic reshuffle of our company staff.

我们公司定期有人事变动。

periodic checks are carried out on the equipment.

设备定期进行检查。

Mailing lists are updated periodically.

邮寄名单定期更新。

periodic checks are taken to ensure that high standards are maintained.

定期检查以确保维持高水准。

...periodic bouts of illness.

周期性发病

Atomic structure and the periodic table.

原子结构和元素周期表.

Implement equipment periodic maintenance and maintenance plan.

设备的定期保养及维修计划实施.

When workers think a periodic purge is imminent, everyone feels equally threatened.

当员工听说要定期裁员时, 人人都同样地感到受威胁.

TITLE: Which thyroid cancer patients need periodic stimulation tests?

题目: 那类甲状腺癌患者需要定期刺激试验?

Elected officials must reelection at periodic intervals, when their record is subject to intensive public scrutiny.

选举产生的官员必须定期接受改选, 届时其业绩要受到彻底的公开审查.

A wave that repeats, like the one above, is called a periodic wave.

如上图所示的周期性的波, 称之为周期波.

Some commercial laboratories use periodic nitrate tests as guides.

许多商业性的试验室已应用定期的硝态氮分析作为指导.

Like macroeconomy, the development of real estate industry also shows a phenomenon of periodic fluctuation.

与宏观经济运行过程中一样, 房地产业也客观存在着周期波动现象.

The process of mineral resources exploration and exploitation has periodic, progressive and repeated features.

矿产资源勘查开采过程具有周期性 、 反复性和渐进性的特点.

The policy reversal as shortages spread the capital, which is usually the country's periodic supply crunches.

政府政策出现逆转,是因为短缺问题已经蔓延到了首都北京.通常情况下, 北京不会受到中国每隔一段时间会发生的供应短缺影响.

These arrangements are subject to periodic reviews.

这几项安排每隔一定时间须予复查.

The interaction properties of periodic waves are found to be inelastic.

研究了这些周期波之间的相互作用,发现其相互作用是非弹性的.

The number of complete cycles of a periodic process occurring per unit time.

生命周期是经济学中用的一个术语.

Discretionary fixed costs arise from periodic ( usually yearly ) budget decisions that reflect top management policies.

可自由处理固定成本产生于反映高层管理人员政策的定期 ( 通常是一年 ) 的预算决策.

Valuations not yet subject to systematic periodic adjustment.

评估还没有系统的周期性调整.

The survival strategy of herpes simplex virus centers on developing latent infection and periodic reactivation.

单纯疱疹病毒在体内的生存策略是建立潜伏感染,一定条件下被激活而致病情复发.

According to Mendeleyev's periodic table, there seem to be still some elements undiscovered yet.

按照门捷列夫周期表, 似乎还有一些元素尚未发现.

A method of target classification based on JEM periodic signature is proposed.

提出了基于JEM周期特征的目标分类方法.

Another example is the F ring, whose periodic clumps seem to have been imprinted by Prometheus.

环是另一个例子, 它起伏规律的纹块似乎是由土卫十六印制出来的.

Some existence theorems of periodic traveling wave solutions for this kind generalized BBM equation are given.

在给定的参数条件下,得到了该方程光滑孤立波解及周期行波解的所有可能的显式表达式.

periodic change imposed on a controlled variable or a function by a controller.

通过控制器控制某一变量或函数进行周期性变化.

Long long ago, we knew the periodic motion of a planet.

很久以前, 我们就知道行星的周期运动.

We study the property of complex periodic function, and obtain some correlation results.

对复周期函数的性质进行了一些研究, 得到了若干有关的结果.

The method can be used in the measurement of periodic and nonperiodic signal.

该方法可以被广泛地应用于高精度频率、时间及相位等信号的测量.

periodic checks are carried out on the equipment.

设备定期进行检查。

用作定语～+ n.

1. Long long ago,we knew the periodic motion of a planet.
   很久以前，我们就知道行星的周期运动。
2. These arrangements are subject to periodic reviews.
   这几项安排须定期检查。

• periodic%20law">periodic law周期律,门捷列夫定律...
• periodic%20table">periodic table周期表
• periodic%20sentence">periodic sentence圆周句(指主要意义至...
• periodic%20inspection">periodic inspection定期检查定期检查,定...
• periodic%20function">periodic function周期函数
• periodic%20repair">periodic repair定期检修
• periodic%20error">periodic error周期误差,周期性误差...
• periodic%20system">periodic system周期系,周期系统...
• periodic%20plankton">periodic plankton周期性浮游生物...
• periodic%20motion">periodic motion周期运动
• periodic%20duty">periodic duty周期运行,循环工作,...
• periodic%20load">periodic load周期性负载
• periodic%20vibration">periodic vibration周期振动
• periodic%20maintenance">periodic maintenance定期维修
• periodic%20sampling">periodic sampling等间隔取样,周期取样...
• periodic%20chart">periodic chart周期表
• periodic%20variation">periodic variation周期性变化
• periodic%20acid">periodic acid高碘酸,过碘酸...
• periodic%20oscillation">periodic oscillation周期振荡
• periodic%20damping">periodic damping周期性制动,周期性阻...

• Her periodic sallies to the shops became more frequent.

  出自：E. Bowen

adj.(形容词)

periodic, alternate

这两个词的共同意思是有规律地重复再现。alternate指两件事物交替出现或一件事物每隔一段时间出现; periodic指可预测的周期性发生。