The weak electric signal from stem and leaf of Rhododendrons is composed with periodic group waves.

杜鹃枝、叶微弱电信号波由具一定的周期性的组峰组成。

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When enabled, changes are written to the journal logs first. Periodic group commits (currently every 100ms) then handle playing these changes back on the real data.

开启该功能时，变更会先写入Journaling日志，定期集中提交(目前是每100 ms提交一次)，然后在真实数据上进行这些变更。

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There is this group of about half a dozen right down the diagonal middle of the periodic chart.

沿着周期表的对角线的中间有大约包含六个元素的元素组。

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So if we consider lithium, potassium, and sodium, they're all together in the same group on the periodic table, knowing what we do about biology we can immediately think of sodium and potassium, or even just knowing what you know about table salt, for example, that these are two elements that we find, and particularly in the ion form in very high concentrations in our body.

我们来考虑一下锂，钾和钠，它们都在周期表中的同一族里，想要知道我们将元素周期律,用到生物学会怎么样，我们首先想到的就是钠和钾，甚至只需要知道食盐，我们发现它们是以很高浓度的离子形式,存在于我们体内的两种元素。

麻省理工公开课 - 化学原理课程节选

It provides periodic calls to a select group of agents to give limited updates on bargaining, calls largely devoted to advising players to save their money.

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Contrast that with new data from Hay Group, a Philadelphia consulting firm that does periodic employee compensation surveys.

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Instead, Microsoft will send out periodic updates with new apps to all Kin phones, says Roger Synder, a group product manager for Microsoft.

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