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。

On some stages, Mario can pair up with his dinosaur buddy Yoshi and use his tongue to grab items and spit them back at enemies.

在某些阶段，可以对马里奥与耀西和他的好朋友恐龙用他的舌头吐出来攫取他们的项目和回敌人。

The phenomenon was spotted by British researchers who were studying whether it is true that we tend to pair up with those who are similarly attractive to ourselves.

英国的研究者们对此现象进行了研究，以明确我们是否习惯于和我们长相差不多的人恋爱交往。

Look, you are so badly dressed. How can you pair up with me?

瞧你这衣冠不整的样子，能配得上我吗？

This shoe does not seem to pair up with that one.

这只鞋似乎与那只不成双。

One great way to stay on target and earn better grades is to pair up with a good study partner.

和一个好的学习伙伴一同学习是提高学习成绩的不错方法。

The study also found we tend to pair up with people whose facial features have a similar level of symmetry - a sign of beauty - to our own.

此研究也发现人们更倾向于选择那些与自己的相貌对称水平(美貌的指标之一)相近的人。

At the junction where the two layers meet, electrons pair up with holes, establishing an electric field that prevents electrons from moving from the n-type material to the p-type.

两层接触处电子与「孔」便成双配对地形成了电场，阻止电子从n层移到的p层。

At the junction where the two materials meet, electrons pair up with holes to form an area depleted of charge that prevents current from flowing.

两种材料的接合处电子与电穴配对形成一个没有电荷的区域，阻止电流通过。

Now the numbers are roughly even (in fact women are earning more degrees) and people tend to pair up with mates of a similar educational background.

现在这个数字的性别比例已经相当（实际上有学位的女性更多），而且人们倾向于选择一个有相同教育背景的人作为自己的伴侣。