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

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.

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?

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.

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.

Periodic checks are carried out on the equipment.

设备定期进行检查。

These arrangements are subject to periodic reviews.

这几项安排每隔一定时间须予复查.

There may be periodic police "sweeps" of crime in the area.

警方可能对该地区的犯罪活动进行定时的“扫荡”。

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.

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.

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 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.

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.

Implement equipment periodic maintenance and maintenance plan.

设备的定期保养及维修计划实施.

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.

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.

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 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.

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.

Valuations not yet subject to systematic periodic adjustment.

评估还没有系统的周期性调整.

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.