如果不是那场等待着他们的无名冒险，他们早就每天晚上掷出一对骰子，并同意一掷出两个六就结束这一切。

Were it not for the nameless adventure that awaited them, they would have thrown a pair of dice each evening and agreed that two sixes would end it all.

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弗洛伊德的病人们的典型家庭结构包括一对父母和两个孩子。

The typical family structure of Freud's patients involved two parents and two children.

《柯林斯英汉双解大词典》

美国妇女生下一对双胞胎，但两个孩子的父亲却并非一人。

An American mother has given birth to twins, who have different fathers.

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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

I can give two names, which will get bound to the two parts of that return tuple.

我可以给它设两个变量,返回的一对值将会被赋给这两个变量。

麻省理工公开课 - 计算机科学及编程导论课程节选

So, we see is when we use the octet rule to look at fluorine molecule, we're combining two fluorine atoms, and what we end up with is an f f molecule where they're sharing two electrons, so making that covalent bond.

那么，我们看到把八隅体规则用到氟分子上,就是把两个氟原子组合起来，最终得到的氟分子中两个原子,共用一对电子，这就构成了共价键。

麻省理工公开课 - 化学原理课程节选