事实上，如果群体里的一个人重复他的观点三次，那么与群体里三个不同的人发表同一个观点相比，前者有后者90%的效果。

In fact, if one person in a group repeats the same opinion three times, it has 90% of the effect of three different people in that group expressing the same opinion.

youdao

这项令人吃惊的心理学研究发现如果群体里的一个人重复他的观点三次，那么与三个不同的人阐述同一个观点相比，前者有后者90%的效果。

This surprising psychology study finds that if one person in a group repeats the same opinion three times, it has 90% of the effect of three different people in that group expressing the same opinion.

youdao

从1990年到2009年，最富有的三个地区与最贫穷的三个地区的人均GDP比值几乎上涨了十分之一。

The ratio of GDP per head in the three richest regions to the three poorest increased by almost a tenth between 1990 and 2009.

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This is very easy molecule because we know exactly where to put them without even having to think, we only have one option, and we'll make a triple bond between the carbon and the nitrogen.

这个分子非常简单,因为我们知道应该把它们放在哪里,甚至不用去想，我们只有一个选择，我们将在碳与氮之间形成一个三键。

麻省理工公开课 - 化学原理课程节选

So, for example, down here I wrote that it was n 2 and that it was h 2, but when I re-wrote the molecules up here, you saw that it's an h h single bond where it's a nitrogen-nitrogen triple bond.

比如，在这下面我写的是氮分子2,而这个是氢分子，但我在上面把这些分子的形式改写了，大家可以看到,这是一个氢与氢之间的单键，含一个氮与氮之间的三键。

麻省理工公开课 - 化学原理课程节选

- Then also, nitrogen, 3 minus -- these are all going to be isoelectronic with neon.

然后还有，氮，负三价-,这些都是与氖原子等电子的。

麻省理工公开课 - 化学原理课程节选