2 pair out on a Friday night, coupled. Yeah, a double date.

两情侣在周五晚上出去玩玩，成双成。是，四人约会。

Pigeons live in pairs, and the mates are very fond of each other.

鸽子是成双成活, 彼此非常恩爱。

When your wife dies, it must be depressing to see other people in a loving relationship.

谁妻子死了 看见成双成幸福 心里都会。

We'll see couples rowing in row boats and paddling in paddle boats.

我们会看到成双成人在划船和划桨。

So that's where the animals two by two.

所以这就是动物成双成原因。

Not always, and not in pairs.

并都是 更会成双成。

The third wheel, like we have this certain amount of like underlying ire reserved for any woman who isn't coupled up.

第三者，就像我们任何没有成双成女人有一种潜藏怒气。

Only about 3% of mammals are monogamous, and, although 95% of birds pair off (at least for one breeding season) , paternity tests have revealed that the avian world is chock-full of cheaters.

只有大约 3% 哺乳动物是一夫一妻制，虽然 95% 鸟类都是成双成（至少在一个繁殖季节内），但亲子鉴定显示，鸟类世界充满了骗子。