The universe has cooled to about 1,000c - cool enough for electrons to pair up with nuclei to form the first atoms.

此时宇宙已冷却到1000摄氏度，温度低到电子开始登场并结合原子核形成大量的原子。

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The universe has cooled to about 1, 000C - cool enough for electrons to pair up with nuclei to form the first atoms.

此时宇宙已冷却到1000摄氏度，温度低到电子开始登场并结合原子核形成大量的原子。

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A third of the kids also carried a backpack fitted with an air-sampling device and a GPS to pair up readings and precise locations.

其中三分之一的儿童还随身携带一个背包，内置空气取样器和GPS，以便将取样器的显示数据和确切位置相匹配。

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So, using our simple valence bond theory, what we would expect is that we want to pair up any unpaired electrons in methane with unpaired electrons from hydrogen and form bonds.

利用简单的价电子成键理论，我们预计,要把所有甲烷中没有配对的电子,和氢原子中没有配对的电子配对来形成键。

麻省理工公开课 - 化学原理课程节选

So if we still have an angle of a 109 . 5 degrees, and again, we still have four unpaired electrons available for bonding, we can make one of those bonds with another s p 3 hybridized carbon, so we're going to make up one pair here.

如果键角仍然是109。,同样，我们还有4个未配对的电子可以用来成键，我们可以用其中的一个,和另外一个sp3杂化碳原子成键，这样我们可以组成一对。

麻省理工公开课 - 化学原理课程节选

Since the deal is not exclusive, Audience is free to pair up with other operators.

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However, AMD plans to pair up chips to release higher-performance parts, adding a higher-end product in roughly eight weeks.

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He had the opportunity to pair up with another elite receiver if he chose Arizona, where Larry Fitzgerald plays.

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