I have a pair of small eyes, a big nose and a pair of big ears.

我有一双小眼睛，大鼻子和一对大耳朵。

youdao

Another of his lucky finds was a pair of candleholders.

他另一个幸运的发现是一对烛台。

《柯林斯英汉双解大词典》

The vase is one of a matching pair.

这只花瓶是一对中的一只。

《牛津词典》

A covalent bond is any time we have a pair of electrons that is shared between two different atoms.

所谓共价键就是我们有两个原子,共用一对电子。

麻省理工公开课 - 化学原理课程节选

OK, so what have I done? I just added a little bit more now. I'm now running through a pair of loops. Again notice the encapsulation, that nice abstraction going on, which is what I want. Once I get to this stage though by the way, there might be more than one solution.

我现在运行了一对循环,再一次注意这个封装,抽象得很好，这就是我想要的结果,我按这种方式走到这一步的时候,可能会有多组答案。

麻省理工公开课 - 计算机科学及编程导论课程节选

And what we have left here is the sulfur, which will also get a pair.

剩下的是硫，它也应该得到一对。

麻省理工公开课 - 化学原理课程节选