其功能与周期蛋白和周期蛋白依赖性激酶形成的异源三聚体存在化学计量关系。

It functions in stoichiometric relationships forming heterotrimeric complexes with cycling and cyclin-dependent kinases.

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历史学家特别喜欢关注趋势和周期。

Historians are particularly concerned with detecting trends and cycles.

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末端的物体，它质量和周期无关，是大概15公斤。

And the mass at the end of it, which doesn't enter into the period, is about 15 kilograms.

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It is just down the hall from this lecture theater. And you bring the Periodic Table and the Table of Constants and a calculator and something to write with.

就在这件教室下面的大厅那,你们带上元素周期表和常数表,还有一个计算器和一些写的东西。

麻省理工公开课 - 固态化学导论课程节选

Here is as pacemaker and this pacemaker does the same thing that a heart pacemaker does, it generates periodic electrical signals.

它和心脏起搏器发挥的作用相似,发出周期性的电信号

耶鲁公开课 - 生物医学工程探索课程节选

So, if we look on the periodic table, comparing, for example, s to o, if we have s it's below o, what happens to ionization energy as we go down a table?

那么，如果我们看周期表上，比较，比如，硫和氧，硫在氧下面，当我们沿着表向下看的时候,电离能是怎么变化的？

麻省理工公开课 - 化学原理课程节选