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

两情侣在上出去玩玩，成双成。是，四人约会。

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 心里都会不舒服。

This is what I miss about being in a couple.

所以很怀念以前成双入日子。

And speaking of ''one aIone''... CharIotte sat in the theater surrounded by coupIes...

说到一个人，夏绿蒂正坐在 尽是成双入剧场里。

Not always, and not in pairs.

并不都是 更不会成双成。

Each fibre comes in a pair and each fibre pair, at a conservative estimate, can transmit 150 million simultaneous phone calls.

每根纤维都是成双出现，根据保守估计，每一纤维可以同时传输 1 亿 5 千万部电话通话。

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。