建材及其组件的无线电元素浓度在人口风险评估是重要的，因为大多数人花费80％的时间是在室内。

The concentration of radio-elements in building materials and its components are important in assessing population exposures, as most individuals spend 80% of their time indoors.

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采用ICP—AES法准确、快速地测定电锌中的铝、铅、铜、镉、铁、锡等微量元素，并对方法的准确度和精密度进行了检验。

The Al, Pb, Cu, Cd, Fe, Sn etc trace element in the electrolytic zinc were accurately and quickly measured by using ICP-AES method.

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跨维度太阳系行动其中一项主要任务就是清除这个实体并且把它带到银河中央太阳，进而将它转化成全然正面的电浆元素精华。

One of the main purposes of MOSS is to dissolve that entity, take it into the Galactic Central Sun and transform it there into a pure positive plasma elemental essence.

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And, this is the difference in electronegativity between the two elements, all right?

就是在两个元素之间的,电负性的差别？

麻省理工公开课 - 固态化学导论课程节选

And then this second term, if we go to the Periodic Table, 2 we will find that the value here for hydrogen is 2.2 98 and the value for fluorine is 3.98.

再算上第二个条件，翻看元素周期表，我们查处H，F电负性分别为2,2。2，3。

麻省理工公开课 - 固态化学导论课程节选

So, he assumed, he referenced or normalized everything to fluorine.

所以他假设，将以用F作为一个标准,来估算其他元素的电负性。

麻省理工公开课 - 固态化学导论课程节选