OK, elements with low average valence electron energy, and here I'm saying below 11 electron volts, these are good electron donors.

平均价电子能都较低的元素，我是指那些低于11电子伏的，这些是很好的电子给体。

麻省理工公开课 - 固态化学导论课程节选

Over here in the lower left corner, we have elements that as a group have very low values of average valence electron energy.

在底层的左侧角落，我们看到以组为单位的,价电子能较低的元素。

麻省理工公开课 - 固态化学导论课程节选

The average speaker knows, as a low-ball estimate, about 60,000 words.

保守估计,说话者平均知道大约六万个词

耶鲁公开课 - 心理学导论课程节选

You know, where the average low temperature in January is minus 10 degrees.

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On average, low-cost carriers like JetBlue outperformed traditional carriers, improving to an overall score of 755, a one point gain from 2012.

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Even February 27th's 400-point fall in the Dow Jones Industrial Average came low down the historical league table of percentage daily falls.

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