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

youdao

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

For the moment,the 3D sets come with one pair of glasses.

VOA: standard.2010.03.11

And if we put that in our bond here, we have 1, 2, 3 bonds, plus we have one lone pair left over.

如果我们把它们放到键里，我们有1，2，3个键，还剩下一对孤对在这里。

麻省理工公开课 - 化学原理课程节选

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

说实话，我就只有一双鞋，因为我只有两只穿鞋的脚。

How many实战 - SpeakingMax英语口语达人

This way it's so much easier and needs only one pair of business shoes.

CNN: Beating the stress of business travel

You don't stay in business with a customer who only wants one pair of jeans.

FORBES: Magazine Article

Nike previously had made one pair of shoes for an 11-year-old disabled child in Oregon.

FORBES: Dear Nike: I Can't Tie My Shoes