Seriously, I only have one pair of shoes because I only have one pair of feet.

说真的，我只有一双鞋，因为我只有一双脚。

youdao

What insects have one pair of wings? What insects have two pairs of wings?

什么昆虫有一对翅膀，什么昆虫有二对翅膀？

youdao

You only have one pair of eyes so take care of them.

眼睛只有一双，所以要保护好眼睛。

youdao

So if we take a look at nitrogen here, what you'll notice is we have thre available for bonding, - and we already have our lone pair -- one of our orbitals is already filled up.

如果我们看一下氮原子，我们注意到我们可以成3个键，我们已经有一个孤对-,其中的一个轨道已经被填满了。

麻省理工公开课 - 化学原理课程节选

Still more perplexing (to men, at least), these same women--after finally deciding on that one great pair--will head right back to the store 10 minutes after getting home to return them.

FORBES: Magazine Article

One boy-girl pair had been unable to talk at all.

NEWYORKER: Personal Best

With six bedrooms, the 1910 home also features an indoor basketball court, wine cellar, elevator, a one-bedroom au pair suite and top-level terraces with views of the San Francisco Bay and Golden Gate Bridge.

WSJ: Huguette Clark's New York Apartments Sell | Private Properties